变速箱的作用是什么？

引起肌张力降低的病变不包括 ( )

A．周围神经病

B．震颤麻痹

C．脊髓灰质炎

D．小脑病变

E．脑风湿病

对一个5岁小儿进行心脏检查，其结果正常的是（）

A.心尖部在左第4肋间，锁骨中线外2cm

B.心尖部在左第4肋间，锁骨中线外1cm

C.心尖部在左第5肋间，锁骨中线处

D.心尖部在左第5肋间，锁骨中线内0.5cm

E.心尖部在左第5肋间，锁骨中线内1cm

某小区的业主委员会因某医院新建住院楼影响了该小区业主的采光，将该市规划委员会起诉至法院，要求撤销规划委员会为医院发放的《建设工程规划许可证》。起诉后出现的以下情况中，原告申请撤诉时法院不应准许撤诉的有：( )

A．被告撤销《建设土程规划许可证》，但作为第三人的医院提出异议

B．被告作出限期拆除住院楼的行政决定

C．被告对该小区采光受影响的业主进行补偿，与原告成达和解

D．被告决定撤销《建设工程规划许可证》，但没有告知法院

A couple of months ago, I went to a department store to buy a few things for the house. I needed a set of curtains for the living room, two table lamps, a mg and several (36) . I asked them to (37) the things as soon as possible, but they said that they were unable to send them out until 20 days later. After about 3 weeks, I received only the curtains and lamps. I was a little disappointed when I didn’t receive all the (38) I had bought. But nevertheless, I was eager to see what the curtains and lamps looked like. I first opened the (39) with the curtains. I had bought a lovely (40) blue, and instead they had sent me a horrible dark (41) Well, you can just (42) how angry I was. Then I opened the boxes with the lamps. They were exactly what I’d (43) . But one of the lamp shapes was damaged. (44) They promised to come and (45) . It has been two weeks since my complaint. (46)

电波在1秒的单位时间内幅值大小与方向周期性重复变化的次数称为（）。

A、频率

B、周期

C、速度

D、波长