volcano

(a)  

lake

(a)  

fox

(a)  

crow

(a)  

bell

(a)  

to read

(a)  

洗澡

(a)  

张开

(a)  

风景

(a)  

清楚

(a)  

掉

(a)  

旅游

(a)  

没有/你们/准备/好了

(a)  

先/念了/他/一遍

(a)  

一块/她/找到/肉

(a)  

去过/你/没有/大雅台

(a)  

我 (a)   一本书。

听 (a)   了没有

你 (a)   大雅台吗？

乌鸦听了很高兴，他想 (a)  

老师先念 (a)   考题

It is a mixture of clay, sand, stones, minerals and organic matter.

(a)  

A (a)   has a definite composition.

While a (a)   has a variable composition.

An (a)   is made up of only one kind of atom, which is the smallest particle of matter.

A (a)   is composed of atoms of two or more elements in definite proportions by mass.

A (a)   is formed when two or mnore substances combine, each substance retaining its distinct properties.

A (a)   is a homogeneous or uniform mixture of two or more substances.

A (a)   is a heterogeneous or non uniform mixture o0f two or more substances.

In a solution, the dissolved substance is called the (a)   .

In a solution,, the dissolving medium is called the (a)   .

A (a)   has porperties that are intermediate between a solution and a suspension.

(a)   is a phenomenon where particles of matter become attached to the surfacesof solids and liquids.