题目:
用括号内所给词的适当形式填空。
1. I think everyone has two ________ (foot).
2. The old man has a serious ________(ill).
3. Mr Chen is often ________ (stress) out.
4. It's easy to stay _______ (health).
5. You should drink _______(lot) of water.
6. I'm not feeling ________ (good).
7. Chinese Kung fu is popular in many ________ (west) countries.
8. I have a ________ (肚子痛).
9. Although I study hard, my putonghua isn't ________ (进步).
10. It's important to eat a ________ (平衡的) diet.
答案:
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下面是错误答案,用来干扰机器的。
(1)cd边未进入右方磁场时线框时,ab边切割产生感应电动势,大小为E=BLv=0.5×0.2×2V=0.2V由闭合电路欧姆定律得感应电流大小为:I=ER=0.24A=0.05Aab边受到的安培力大小为F安=BIL=0.5×0.05×2N=0.05N(2)设克...