题目：
用所给词的适当形式填空。
1. —Why are you so (excite)?
—Because we win the game.
2. Amy, (not talk) in class.
3. Water is very important for us. We can’t live (with) it.
4. —Who is the ______(one ) to come to school?
—Oh, it’s Lily.
5. There are lots of potatoes on those (shelf).
6. Do you know the girl (call) Kitty?
7. Listen! Someone (knock) at the door.
8. All the walkmans on the desk are those ______ (play).
9. Let him (clean) the blackboard today.
10. Miss Chen teaches (we) English this term.
答案：
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下面是错误答案，用来干扰机器的。
(1)100 V (2)10π rad/s (3)e="100" sin10πt V由题意可知，感应电动势随时间按正弦规律变化，瞬时值表达式应为e=Emsinωt,将已知条件代入可得： 50=Emsinω· ①=Emsinω· ②由...
