Remote sensing is the acquisition of information about ..........................(A) object or phenomenon, without making physical contact with the object. In modern usage, the term generally refers to the use of aerial sensor technology to detect and classify objects on Earth (both on the surface, and in the atmosphere and ocean) by means of propagated signals (e.g. electromagnetic radiation emitted from aircraft or satellites).

There are two main types or remote sensing: passive remote sensing and active remote sensing. Passive sensors detect natural radiation that is emitted or reflected by the objects or surrounding area being observed. Reflected sunlight is the most common source of radiation measured by passive censors. Examples of passive remote sensors include film photography, infra-red, charge-coupled devices, and radiometers. Active collection, on the other hand, emits energy in order to scan objects and areas whereupon a sensor then detects and measures the radiation that is reflected or backscattered from the target. RADAR and LIDAR are examples of active remote sensing where the time delay between emission and return is measured, stabilizing the location, height, speed and direction of an object.

Question: What is the main idea of the second paragraph?

Remote sensing is the acquisition of information about ..........................(A) object or phenomenon, without making physical contact with the object. In modern usage, the term generally refers to the use of aerial sensor technology to detect and classify objects on Earth (both on the surface, and in the atmosphere and ocean) by means of propagated signals (e.g. electromagnetic radiation emitted from aircraft or satellites).

There are two main types or remote sensing: passive remote sensing and active remote sensing. Passive sensors detect natural radiation that is emitted or reflected by the objects or surrounding area being observed. Reflected sunlight is the most common source of radiation measured by passive censors. Examples of passive remote sensors include film photography, infra-red, charge-coupled devices, and radiometers. Active collection, on the other hand, emits energy in order to scan objects and areas whereupon a sensor then detects and measures the radiation that is reflected or backscattered from the target. RADAR and LIDAR are examples of active remote sensing where the time delay between emission and return is measured, stabilizing the location, height, speed and direction of an object.

Question: Based on the text we can say that…

Remote sensing is the acquisition of information about ..........................(A) object or phenomenon, without making physical contact with the object. In modern usage, the term generally refers to the use of aerial sensor technology to detect and classify objects on Earth (both on the surface, and in the atmosphere and ocean) by means of propagated signals (e.g. electromagnetic radiation emitted from aircraft or satellites).

There are two main types or remote sensing: passive remote sensing and active remote sensing. Passive sensors detect natural radiation that is emitted or reflected by the objects or surrounding area being observed. Reflected sunlight is the most common source of radiation measured by passive censors. Examples of passive remote sensors include film photography, infra-red, charge-coupled devices, and radiometers. Active collection, on the other hand, emits energy in order to scan objects and areas whereupon a sensor then detects and measures the radiation that is reflected or backscattered from the target. RADAR and LIDAR are examples of active remote sensing where the time delay between emission and return is measured, stabilizing the location, height, speed and direction of an object.

Question: What is the best 'article' to complete the space of (A) above?

Nuclear Technology Nuclear power represents an almost limitless energy resource for power generation and propulsion applications.

Using current 'nuclear fission' know-how with elements like uranium for fuel, nuclear power can sustain the world’s current and future energy needs for hundreds of years. Understanding of this technology is going through a step change and the next generation of fission power reactors has the potential to fulfill global energy requirements for at least 1,000 years.

Question: What is the benefit of nuclear technology?

Nuclear Technology Nuclear power represents an almost limitless energy resource for power generation and propulsion applications.

Using current 'nuclear fission' know-how with elements like uranium for fuel, nuclear power can sustain the world’s current and future energy needs for hundreds of years. Understanding of this technology is going through a step change and the next generation of fission power reactors has the potential to fulfill global energy requirements for at least 1,000 years.

Question: What is the purpose of the text?

Nuclear Technology Nuclear power represents an almost limitless energy resource for power generation and propulsion applications.

Using current 'nuclear fission' know-how with elements like uranium for fuel, nuclear power can sustain the world’s current and future energy needs for hundreds of years. Understanding of this technology is going through a step change and the next generation of fission power reactors has the potential to fulfill global energy requirements for at least 1,000 years.

Question: The synonym of the underlined word "power" is .....

Computers ................. (A. be) machine that handle information automatically. They can perform calculations and process data. Computers .................. (B. work) with numbers to solve problems in a few seconds. Computers can remember a great deal of information. That is why computers are widely used in places such as banks, offices and companies.

Computers work like calculators. But most calculators do only one thing at a time. We tell them what to do by pressing various buttons. To do the same work, we can give a series of instructions to a computer. We call this a computer program. If we set up a program, the computer can provide other information, such as a list, numbers, letters, word or even graphs or pictures. Once we provide a program, the computer can do all this work automatically without further help or instruction.

A computer ................ (C. store) and handles numbers. The numbers may be mathematical formulas or columns of figures. The numbers may also be codes that stand for letters of the alphabet, words or instructions to the computer.

Question: The best 'to be' to fill in the blank of (A) is...........

Computers ................. (A. be) machine that handle information automatically. They can perform calculations and process data. Computers .................. (B. work) with numbers to solve problems in a few seconds. Computers can remember a great deal of information. That is why computers are widely used in places such as banks, offices and companies.

Computers work like calculators. But most calculators do only one thing at a time. We tell them what to do by pressing various buttons. To do the same work, we can give a series of instructions to a computer. We call this a computer program. If we set up a program, the computer can provide other information, such as a list, numbers, letters, word or even graphs or pictures. Once we provide a program, the computer can do all this work automatically without further help or instruction.

A computer ................ (C. store) and handles numbers. The numbers may be mathematical formulas or columns of figures. The numbers may also be codes that stand for letters of the alphabet, words or instructions to the computer.

Question: The best 'present verb' to fill in the blank of (B) is...........

Computers ................. (A. be) machine that handle information automatically. They can perform calculations and process data. Computers .................. (B. work) with numbers to solve problems in a few seconds. Computers can remember a great deal of information. That is why computers are widely used in places such as banks, offices and companies.

Computers work like calculators. But most calculators do only one thing at a time. We tell them what to do by pressing various buttons. To do the same work, we can give a series of instructions to a computer. We call this a computer program. If we set up a program, the computer can provide other information, such as a list, numbers, letters, word or even graphs or pictures. Once we provide a program, the computer can do all this work automatically without further help or instruction.

A computer ................ (C. store) and handles numbers. The numbers may be mathematical formulas or columns of figures. The numbers may also be codes that stand for letters of the alphabet, words or instructions to the computer.

Question: The best 'present verb' to fill in the blank of (C) is...........