现阶段我国学校体育有哪些特征？

阅读理解。

     When Mr David retired (退休), he bought a small house in a village near the sea. He liked it and hoped

to live a quiet life in it.

      But to his great surprise, many tourists came to see his house in summer holidays, for it was the

most interesting building in the village. From morning to night there were tourists outside the house.

They kept looking into the rooms through the windows and many of them even went into Mr David's

garden. This was too much for Mr David. He decided to drive the visitors away. So he put a notice

on the window. The notice said: "If you want to satisfy your curiosity (好奇心), came in and look round.

Price: twenty dollars." Mr David was sure that the visitors would stop coming, but he was wrong. More

and more visitors came and Mr David had to spend every day showing them around his house. "I came

here to retire, not to work as a guide." he said angrily. In the end, he sold the house and moved away.

1. Mr David's house was _____ that many tourists came to see it.[ ]

A. so small

B. so quiet

C. so interesting

D. such interesting 

2. Mr David put a notice on the window in order _____. [ ]

A. to drive the visitors away

B. to satisfy the visitor's curiosity

C. to let visitors come in and look round

D. to get some money out of the visitors

3. The notice made the visitors _____. [ ]

A. more interested in his house

B. lose interest in his house

C. angry at the unfair price

D. feel happy about the price

4. After Mr David put up the notice _____. [ ]

A. the visitors didn't come any longer

B. fewer and fewer visitors came to see his house

C. more and more tourists came for a visit

D. no tourists would pay the money for a visit

5. At last he had to sell his house and move away because _____. [ ]

A. he did not like it at all

B. he could not work as a guide

C. he made enough money and wanted to buy a new expensive house

D. he could not live a quiet life in it

已知某挖土机挖土的一个工作循环需2分钟，每循环一次挖土0.5m³，工作班的延续时间为8小时，时间利用系数K=0.85，则该机械的产量定额为( )m³/台班。

A．12.8

B．15

C．102

D．120

89年7月1日以后建造的化学品液货船应符合什么规则的要求？

怎样判断闸板脱落？

脏腑可按其生理功能特点分为

A．六腑
B．五脏、六腑
C．五脏
D．五脏、六腑、奇恒之腑
E．以上均非