问题
不定项选择
不定项选择 |
英国物理学家焦耳的主要贡献有( ) |
A.发现了电流通过导体产生热量的定律,即焦耳定律 B.测量了热和机械功之间的当量关系——热功当量 C.第一次计算了气体分子的速度 D.与W.汤姆孙合作研究了气体自由膨胀降温的实验 |
答案
ABCD
不定项选择 |
英国物理学家焦耳的主要贡献有( ) |
A.发现了电流通过导体产生热量的定律,即焦耳定律 B.测量了热和机械功之间的当量关系——热功当量 C.第一次计算了气体分子的速度 D.与W.汤姆孙合作研究了气体自由膨胀降温的实验 |
ABCD
根据对话内容,从方框中的六个选项中选出五个合适的句子补全对话。 Linda: Hello, 76_____________ . Peter: I’m reading a book about the people’s lives in the future. Linda: Oh, it’s interesting. What will the people’s lives be in the future? 77________ Peter: Yes, I think so, but I hope not. Linda:78________ Peter: Because there won’t be enough food, fuel and room for too many people on the earth! Linda: That’s true. 79_______ Peter: It’s too hard. But maybe people will have on space stations (空间站) on the moon and grow vegetables (种植蔬菜)there. Linda: 80______. By the way, do you think everyone will speak the same language in the future? Peter: I hope so. Then people in different countries will understand each other better.
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