阀门型号A42Y-16C，其中C表示（）。A．阀体材料为合金钢 B．密封面材料为碳紊

国家为了公共利益的需要，可以依法对土地实行（）并给予补偿。

A．征收

B．征用

C．购买

D．划拨

E．无偿使用

Before you go to another country it is a great help if you know the language and some of the customs（风俗）of the country.

When people meet each other for the first time in Britain, they say “How do you do?” and shake hands（握手）. Usually they do not shake hands when they just meet or say “Goodbye”. But they shake hands after they haven’t met for a long time or when they will be away from each other for a long time.

Last year a group of German students went to English for a holiday. Their teacher told them that the English people hardly shake hands. So when met their English friends at the station, they kept their hands behind their backs. The English students had learned that the Germans shake hands as often as possible. So they put their hands in front and get ready to shake hands with them. It made both of them laugh.

小题1:It is        if you know the language and some of the customs of the country.

A．not useful

B．not helpful

C．very helpful

D．very bad小题2:English people usually shake hands when they       .

A．meet every time

B．meet for the first time

C．say goodbye to each other

D．say hello to each other小题3:Which of the following is true?

A．German people shake hands as often as possible.

B．English people like shaking hands very much.

C．German people hardly shake hands.

D．Neither people hardly shake hands.小题4:This story is about       .

A．shaking hands

B．language

C．customs

D．languages and customs

对于以消除或缓解症状为目的的骨转移病变，重要、有效的姑息性手段是（）。

A.手术治疗

B.化学治疗

C.免疫治疗

D.放射治疗

E.靶向治疗

地下水泵接合器的安装，应使进水口与井盖底面的距离不大于（），且不应小于井盖的半径。

A.0.4m

B.0.5m

C.0.6m

D.0.7m

面有关厨房自动卸载的说法，哪个是对的？（）

A.当一个发电机的汇流条失去电源时。

B.APU总负载超过最大值时。

C.A和B都对。

D.不能自动卸载。