高程测量依所用仪器和测算方法不同分为气压高程测量,三角高程测量和水准测量。

学校图书馆新买来科技书和文艺书共450本，买来的这两种书的本数比不可能是3：4．______．

VHF DSC中的调制解调器采用的频移是（）。

A.+3kHz

B.+5kHz

C.+85Hz

D.+400Hz

Jack went to a barber's shop and had his hair cut, but when he came out, he was not happy with the result(结果). When his friend Bob saw him, he laughed and said, "What has happened to your hair, Jack?"

Jack said, "I tried a new barber's shop today, because I wasn't quite satisfied with my old one, but this one seems even worse."

Bob agreed(同意). "Yes, I think you're right, Jack. Now I'll tell you what to do when you go into a barber's shop next time: look at all the barber's hair, find out whose hair looks worst, and then go straight to him."

"Why shall I go to him?" Jack asked. "But that would be foolish!"

"Oh, no, it wouldn't," answered Bob. "Who cut that man's hair? Just think it. He couldn't cut it himself, could he? Another of the barbers cut it. So you know he can't be the worst barber."

小题1: When Jack went out of the barber's shop, he was not happy because ____.

A．nobody had cut his hair

B．the barber hadn't cut his hair well

C．the barber had cut his hair carefully

D．he was not satisfied with his old barber小题2:"I tried a new barber's shop today." means ____.

A．this barber's shop was a new one

B．this was the only barber's shop in this town

C．Jack often went to this barber's shop

D．Jack had not been to this barber's shop before小题3:After Jack had his hair cut, he thought ____.

A．the new barber's shop was the best one

B．the old barber's shop wasn't so good as the new one

C．the new barber's shop was worse than the old one

D．the old barber's shop was the worst one小题4:Bob told Jack to find out which barber's hair looked the worst and then go straight to him. Why?

A．Because he was certainly the best barber.

B．Because he was free all the time.

C．Because he was the worst barber.

D．Because he wasn't the worst barber.小题5:From the story we know that ____.

A．it's foolish to have one's hair cut at a barber's shop

B．barbers cut each other's hair

C．barbers never have their hair cut

D．a barber always cuts his hair by himself

2011年2月22日，湖南第一家大型网络问政平台、最权威的网络问政直通道——红网《问政湖南》频道正式上线。网友、湖南各级党政一把手，可以通过网络沟通彼此，实现“一对一”、“零距离”的交流对话。《问政湖南》频道上线

①拓宽了公民参与民主监督的渠道        ②扩大了公民的民主权利

③有利于政府了解民意、汇集民智        ④方便了公民直接行使国家权力

A．①③

B．②③

C．③④

D．②④

维生素D缺乏性佝偻病时由骨样组织增生所致的骨骼改变为( )。

A．方颅

B．肋膈沟(赫氏沟)

C．鸡胸或漏斗胸

D．O形腿或X形腿

E．脊椎后突或侧弯