在亮照明时，视觉主要由锥状细胞起作用，弱照明时，视觉主要由（）起作用。

一个长方形操场长60米，扩建后长增加15米，宽增加8米，扩建成的操场面积增加1275平方米．操场原来的宽是______米．

阅读理解（共15小题；每小题2分，满分30分）

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

A

Tom arrived at the bus station quite early for the London bus. The bus for London would not leave until five to twelve. He saw a lot of people waiting in the station. Some were standing in lines; others were walking about. There was a group of schoolgirls. Their teacher was trying to keep them in order. Tom looked around but there was nowhere for him to sit.

He walked into the station café. He looked up at the clock there. It was only twenty to twelve. He found a seat and sat down, facing a large mirror on the wall. Just then, John, one of Tom’s friends, came in and sat with Tom.

“What time is your bus?” asked John.

“Oh, there is plenty of time yet,” answered Tom.

“Oh, I’ll get you some more tea then,” said John.

They talked while drinking. Then Tom looked at the clock again.

“Good heavens! It’s going back-ward!” he cried. “A few minutes ago it was twenty to twelve and now it’s half past eleven.”

“You are looking at the clock in the mirror,” said John.

Tom wanted to kick himself for being so foolish. The next bus was not to leave for another hour. He has never liked mirror since then.

小题1:Tom went into the station café because _______.

A．John asked him to have a cup of tea

B．he wanted a drink there

C．he would meet a friend of his

D．it was early yet and he could find a place to sit小题2:When we look at a clock in the mirror we’ll see _______.

A．the right time

B．it is going slower

C．it is going backward

D．it is going fast小题3: Which of the following is true?

A．Tom missed his bus.

B．He liked mirror even before.

C．The next bus would leave soon.

D．Tom arrived London on time.

一般来说，MIS从职能结构上进行横向划分时，可分成高层战略层、中层什么层和基层执行层

A．指挥层

B．战术层

C．计划层

D．操作层

公开募集证券说明书所引用的审计报告、盈利预测审核报告、资产评估报告、资信评级报告，应当由有资格的证券服务机构出具，并由至少( )名有从业资格的人员签署。

A．1
B．2
C．3
D．5