题目内容
This substance ________ a gas when heated .
[ ]
|
A.gives in |
|
B.gives out |
|
C.give away |
|
D.gives up |
答案:B
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题目内容
This substance ________ a gas when heated .
[ ]
|
A.gives in |
|
B.gives out |
|
C.give away |
|
D.gives up |