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【单选题】
对于可逆反应：2A（g）+B（g）?2C（g）；△H＜0，下列各图正确的是（设变化过程中物质的聚集状态没有发生改变）（ ）A.
B.
C.
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皮皮学刷刷变学霸
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【简答题】Why couldn’t Ivan take his kids scuba diving?
【简答题】短文改错。 Not too long ago, people can't go scuba diving on Hainan Island, or anywhere else. This were because there was no machine allowing a person breathe under water for long time. In 1943 Jacques Co...
【单选题】—I had a great time in the summer holidays.We went scuba－diving in Hawaii. —Wow！________
A.
I'm going to Hawaii，too.
B.
How generous you are!
C.
That sounds really cool!
D.
Enjoy yourself!
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