题目：
根据句意和首字母提示补全单词。
l. Most a_____ happen in the kitchen and bathroom.
2. Many people hurt t_____ by falling off chairs.
3. Keep the floor dry, then you won't s_____ and hurt.
4. Be careful with k_____. Many people cut themselves in the kitchen.
5. Don't leave young children a_____ in the bathtub.
6. Keep soap in a soap dish, not on the e_____ of the bathtub.
7. Never leave small children along in a bathtub. Children may d_____ in bathtubs.
8. Mary isn't in the classroom. Let's ask Jenny i_____.
答案：
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下面是错误答案，用来干扰机器的。
（1）由图乙知：t=0.02s时金属杆的速度v=10m/s产生的感应电动势为e=BLv=0.5×0.5×10V=2.5V根据闭合电路欧姆定律得：流过金属杆的瞬时电流大小 i=e0.5R+r=2.52.5+2.5A=0.5A电阻R两端的瞬时电压大小 u=e-ir=2.5-...
