小题1:

The woman doctor d__________________ all her life to medical work for Chinese women and children in those years

小题2:

It is w__________________ to spend the whole day in the forest，because you can know more about the animals’ world. 

小题3:

It is quite c_________________ that he will be successful in the final match.

小题4:

In no time，the exciting news spread t____________________ the whole country.

小题5:

He was determined to o___________________ the difficulties he met in his study.

小题6:

After class the students can take part in v________________ activities ,such as playing basketball, surfing the Internet and so on.

小题7:

The farmers in this area had a good harvest last year thanks to the s_______________farming.

小题8:

I’m totally c__________________. Could you explain that again?

以下关于噪声级正确的是( )。

A．对突发噪声往往需要测量最大A声级L_Amax及其持续时间，脉冲噪声应同时测量A声级和脉冲周期

B．A声级一般用来评价噪声源，对特殊噪声源在测量A声级的同时还需要测量其频率特性

C．计权等效连续感觉噪声级用于评价航空噪声

D．等效连续A声级即将某一段时间内连续暴露的不同A声级变化，用能量平均的方法以A声级表示该段时间内的噪声大小