在（）的情况下不能对不合格品采取让步或放行。
A.有关的授权人员批准
B.法律不允许
C.顾客批准
D.企业批准
参考答案：B
用所给词的适当形式填空。
1. I don't have much time (play) with my friend.
2. Thank you very much for (write) to me.
3. Every day Millie spends half an hour (study) English.
4. Lily always helps her mother (clean) the house.
5. Daniel (not want) a new computer.
举重运动员在3 s内把1500 N的杠铃举高到2m，他对杠铃做了______J的功，功率是______W，若举在空中停了3 s，则这个过程做了______J的功，功率是______W．
