不高于______V的电压对人体是安全的，家用电冰箱工作时所接的电

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问题填空题

不高于______V的电压对人体是安全的，家用电冰箱工作时所接的电压是______V．

答案

家庭电路的电压为220V，所以家用电冰箱工作时所接的电压是220V；对人体的安全电压为不高于36V．

故本题答案为：36；220．

听力题

单词拼写（共10小题；每小题1分，满分10分）

小题1: I was f__________ to take a taxi because the last bus had left.

小题2: Mary gave b__________ to a healthy baby girl.

小题3: In spite of her problems, she carried on working as u__________.

小题4:The mother held the baby in her arms and kissed him g__________

小题5:Mr. Huang i__________ us in long distance running yesterday.

小题6: Parents can influence the __________ (behave) of their children.

小题7: We’d like to take up your __________ (invite) to visit you some time.

小题8: He drove her __________ (direct) to her hotel.

小题9: We should __________ (consideration) what to do next.

小题10: Mozart is a very __________ (create) musician.

判断题

DNA修复的第一步是由专用于修复过程的酶催化的，下面的步骤由DNA代谢过程中的常用酶催化。