塔器的直径和高度较大，质量在350~700t之间时，吊装可采用的起重设备为()。A.

【选修3-4选做题】

在某介质中形成一列简谐波，波向右传播，在0.1 s时刻刚好传到B点，波形如图中实线所示，且再经过0.6 s，P点也开始起振，求：

（1）该列波的周期T；

（2）从t=0时刻起到P点第一次达到波峰时止，O点对平衡位置的位移y₀及其所经过的路程s₀各为多少？

（3）若该列波的传播速度大小为20 m/s，且波形中由实线变成虚线需要经历0.525 s时间，则该列波的传播方向如何？

句型转换。

1．It’s September.(对划线部分提问)

      _____ _____ _____today?

2．The mask behind the door is Millie’s.(对划线部分提问)

      _____ _____is Millie’s?

3．Her birthday is on August 3r.(同义句)

      She _____ _____ on August 3rd.

4．Daniel plays basketball three times a day.(对划线部分提问)

      _____ _____ _____Daniel _____basketball?

5．Lilei is a very good football playe.(同义句)

      Lilei is very good_____ _____football.

6．We need to practise speaking English more.(否定句)

      We_____ _____ _____practise speaking English more.

7．Daniel,is,a,costume,boy,tiger,the,in(连词成句)

      _________________________________________________

8．China,Teachers’,celebrate,people,in,September, Day,on,10”.(连词成句)

      _________________________________________________

有两种以上违反治安管理行为的择重处罚。 ( )

One might ask why speculation is permitted when there is so real a danger of loss. The basic reason is that speculation can perform useful functions in the market equilibrium and encourages faster entry of more suppliers. If the price change lagged until after an actual commodity shortage had occurred, the fluctuation would probably be sharper and more sudden. Remedial supply action could not be further delayed. Similarly, if speculators foresee a surplus in some commodity, their selling of futures will help drive the price down to some extent before the surplus actually occurs. When speculators foresee a shortage and bid up the price, they are also helping to conserve the present supply.

核心系统中，对于超过正常发报截止时间17：00后仍须通过总行办理的紧急、特殊的MT付款指令（港币除外），下列正确的处理方式为（）。

A.给总行打电话；

B.在分行核心系统使用8501/8502交易直接起报；

C.向总行申请头寸成功后，在分行核心系统使用8501/8502交易起报；

D.向总行申请头寸成功后，在分行国结系统起报。