序列中的TR时间是指（） A.序列一个周期的时间 B.序列中翻转时间 C.序列中回波

下面哪些行为不与控制信道相关（）

A.DTX

B.加密

C.跳频

D.GMSK

以下不含有“研究”、“探究”义的是（）

A."若能寻余所集，思过半矣"中的"寻"

B."今并味精英，钤其要妙"中的"味"

C."实性理之精微，格物之通典"中的"格"

D."予开卷细玩"中的"玩"

E."岁终稽考而制其食"中的"稽"

A woman called Julia lived in the countryside, one year she decided to visit the capital city to see the sights. She stayed at a hotel near the central market. She had seldom been to the city before, and was very excited about what she would find.

On the first morning of her visit, as she walked from the hotel to the market, she passed a beggar (乞丐). He was holding up a notice, which said, “Blind from birth. Please give generously(慷慨地).”Julia felt sorry for the beggar and she bent down and put a dollar coin into his bowl. “Thank you.” he said. The same thing happened again the following day. On the third day, however, Julia did not have a dollar coin. She had only fifty cents, so she dropped this into the beggar’s bowl. “What have I done wrong?” the beggar said, “Why are you so stingy (吝啬的) today?”

Julia was very surprised at the beggar . “How do you know I haven't given you a dollar?” she said, “If you’re blind you can't know what coin I put into your bowl.” “Ah,” explained the beggar, “The truth is that I'm not blind. I'm just looking after this place for the regular beggar while he’s on holiday.” “On holiday?” Julia said, “And what exactly does your blind friend do on holiday?” “He goes into the countryside,” the man said, “and takes photographs. He's a very good photographer.”

小题1:Where was the beggar sitting?

A．In the market.

B．In the busiest part of the city.

C．Outside the shops.

D．Between Julia's hotel and the market.小题2:On the first two days, ____.

A．the blind man waited for Julia

B．the blind man demanded money from Julia

C．Julia gave the blind man some money

D．Julia gave him nothing小题3: On the third day, the blind man____ .

A．accepted Julia's fifty cents quite happily

B．noticed that Julia had only given him fifty cents

C．refused Julia's fifty cents

D．also received one dollar from Julia

硫化氢不能加速非金属材料的老化。（）

同步发电机机端发生三相短路时，转子励磁绕组和定子三相绕组电流之间存在一定的对应关系，其中与转子励磁绕组中的周期自由分量相对应的定子绕组短路电流分量为（）

A、基频周期分量

B、基频周期分量稳态值

C、非周期分量与倍频分量

D、基频周期分量与倍频分量