在三角高程测量中，采用对向观测可以消除什么的影响？

Pearl and June were good friends and spent most of their time together.

They were both very old and they worried about their health. Most of the time they talked about nothing else.

They worried about their food. Was it clean? Would it give them pains in the stomach?

They worried about the weather. Was it too cold and wet? Would it give them pains in their bones?

They worried about pollution in the air. would it give them pains in their chests(胸部)and throats(喉咙)?

They worried about being hurt in a car accident, killed in a plane crash, getting sick, and so on.

All they could think about was being ill or hurt.

One day they went on a train journey together.

“We’ll need some food,”Pearl said.

“We’ll buy some bananas,”June said.“They are good to eat and always clean.”

And so they bought two bananas to eat on the train.

It was not long before they were hungry.

Pearl took out the bananas and gave one to June. Then she peeled(剥)the skin of her banana and took a large bite of it.

At that moment the train went into a tunnel. Everything went black.“Don’t eat your banana,”Pearl shouted at June.“Mine has made me go blind!”

小题1:What did the two old ladies talk about most of the time? _________

A．Themselves.

B．Other people.

C．Healthy food.

D．Dangerous drivers.小题2: The old ladies didn’t want to ______.

A．eat any bananas

B．travel by train

C．be young again

D．get sick小题3:Pearl ate her banana ________.

A．after they came out of the tunnel

B．at the station

C．before June ate hers

D．before she was hungry小题4: Pearl thought that the banana _______.

A．stopped her from seeing

B．would make her hungry

C．would make her ill

D．would be good for June小题5:What’s the best title of the story? __________.

A. What Good Friends                   B. What a Bad Train Journey

C. Bananas Are Good for You            D. Bananas Are Bad for You

影响城市用地经济性评价的因素一般可以分为( )。

A．基本因素层

B．整体因素层

C．派生因素层

D．部分因素层

E．因子层

根据车船税法律制度的规定，拖船的计税单位为（）。

A.每辆

B.整备质量每吨

C.净吨位每吨

D.艇身长度每米

如图表示“城市建筑高度随距市中心距离远近的变化趋势”，据图回答问题。

小题1: 致城市建筑高度随距市中心距离而变化的主要原因是

A．交通的通达度

B．环境质量

C．建筑技术水平

D．地价水平小题2:仅考虑上题因素，城市各功能区由市中心到郊区依次

应为

A．工业区,商业区,住宅区

B．住宅区,商业区,工业区

C．商业区,住宅区,工业区

D．商业区,工业区,住宅区