问题
判断题
交流电路中有功功率与无功功率的比值称为功率因数。
答案
参考答案：错
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交流电路中有功功率与无功功率的比值称为功率因数。
参考答案：错
| 从方框中选出适当的句子补全对话，其中有两项是多余的。 | |
| Bill: Good evening! Joy: Good evening! Bill: Oh, let's have supper. 1 Joy: A hamburger, some French fries and a glass of orange juice. Bill: Sorry, I have no orange juice here. 2 Joy: It isn't my favorite drink. Well, give me a glass of water. Bill: There's some apple juice in the next room. 3 Joy: Sure, thanks. What would you like for supper? Bill: 4 They're my favorite food. Joy: Dumplings? They're my favorite food, too. Bill: Would you like some, then? Joy: But the hamburger... Bill: 5 I can put it in the fridge (冰箱).
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