中央经济工作会议指出，全面落实科学发展观，加快构建社会主义和谐社会，继续加强和改善宏

句型转换。

1. Yesterday mother bought me a computer.(改为同义句)

    Yesterday mother _____a computer _____ _____.

2. The students do some cleaning on Saturday.(对画线部分提问)

    _____ _____ the students do _____ cleaning?

3. John has gone to school．(用by the time改写)

    John _____ _____ to school by the time I called him.

4.I was late for school because my alarm clock didn't go off.(对画线部分提问)

   _____ _____you late for school?

5. By the time I got up, my brother had taken a shower.(对画线部分提问)

    What _____ your brother _____by the time you got up?

某公司本年主营业务收入为870万元，利润总额为300万元，主营业务成本为400万元，为当年的科技支出合计为85万元，则本年技术投入比率是（）。

A.21.25%

B.9.77%

C.28.33%

D.11.5%

下列防护等级为( )的灯具不能用在户外。

A．IP65

B．IP55

C．IP44

D．IP20

神经性呕吐

A．认知行为疗法
B．氟西河+认知行为疗法
C．苯二氮草类治疗+认知行为疗法
D．苯二氮草类治疗
E．氯丙嗪

图5-36所示矩形截面对形心轴xc轴的惯性矩为（）。

A.A

B.B

C.C

D.D