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Science
1st Grade

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13 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下图显示一把斧头。
为什么斧头上有红褐色的粉末?
斧头生锈了
斧头肮脏了
斧头褪色了
斧头涂了一层漆
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪些物品会生锈?
I. 金戒指
II. 塑料瓶
III. 剪刀
IV. 栏杆
I 和 II
I 和 IV
II 和 III
III 和 IV
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
导致铁制品生锈的原因是什么?
I. 水
II. 空气
III. 阳光
IV. 铁
I 和 II
I 和 III
II 和 IV
III 和 IV
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪些铁钉会生锈?
K 和 L
L 和 M
J, K 和 L
K, L 和 M
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪些铁钉会生锈?
K 和 L
L 和 M
J, K 和 L
K, L 和 M
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项不是防锈的重要性?
确保安全
浪费维修费
延长使用期
保持物品干净
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下图显示学生用橡皮泥把铁钉粘在容器里,然后把容器倒置在装有水的盆里。
虽然铁钉没有之间接触到水,但几天后还是生锈了。你可以作出什么结论?
容器里有空气和水蒸气
水阻止容器里的空气流到外面
铁钉是用容易生锈的材料制成的
铁钉在封闭的空间里最容易生锈
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