一高龄女性患者摔倒后臀部着地，最有可能发生的骨折是哪些()A．桡骨干骨折 B．脊柱压

三角形的底越长，面积就越大。[ ]

用所给词的适当形式填空

小题1:We ______________________(not see) each other since last week.

小题2:The roller coaster moved at high speed and was very _____________(excite).

小题3:We _______________(wait)for the bus when a traffic accident happened.

小题4:_______________(be) pollution a serious problem then?

小题5:All of us went on a school trip to South Hill except ____________(he) last week.

The economic model that enables consumers to sell goods or services to each other is( ).

A．C2G

B．C2B

C．B2B

D．C2C

错合隔离开关应如何处理？

瓦口加50丝垫子的轴瓦与轴颈压铅丝的厚度为60丝，如果想到30丝的间隙，瓦口应加（）丝的垫子。

A.20

B.40

C.60