估计风险事故造成的损失次数可以使用（）。 A.二项分布 B.正态分布 C.泊松分布

王强今年a岁，张亮比王强大4岁，10年后张亮比王强大______岁．

慢性胃炎最常见的临床表现是

A．上腹饱胀不适、疼痛

B．无症状

C．饥饿痛、夜间痛

D．呕吐咖啡色液体

E．反复黑便

We are living in a wonderful age, which has become wonderful largely through the scientific discoveries and inventions. There are always new discoveries and new knowledge ahead in every field. For example, much is yet to be discovered in electricity. Weather forecasting is an important area today. Science is doing much in the control of diseases.

Science is a never-ending road for us to go along. Every field gives changes to the person who wants to make science his life work.

Science is also a method of thinking, which can teach us how to solve problems and help us to arrive at the truth. The men and women who will be the scientists of tomorrow are in our colleges, factories and farms today. We are all potential scientists.

小题1: The main idea of this passage is _____.

A．all scientists begin to study when they are very young

B．science teaches us how to work better

C．science is a never-ending road for people to go along

D．weather forecasting is important小题2:Discoveries and inventions are the results of the study and use of _____.

A．electricity

B．science

C．weather

D．the truth小题3:There are always discoveries _____ for people to make.

A．in electricity

B．in weather forecasting

C．in every field

D．in thinking小题4: Science teaches us how to work by ______ method.

A．important

B．scientific

C．old

D．new小题5:The underlined word "potential" means _____.

A．worth

B．probable

C．learned

D．lazy

屋顶平面图主要表示内容包括（）

A.排水分区、天沟、屋面坡度、雨水口的位置

B.电梯机房、楼梯间、水箱、天窗的位置

C.剖面图的剖切位置线和投射方向及其编号

D.泛水、女儿墙、檐口等细部构造

读我国区域图，回答下列各题。

①地植被比②地更加繁茂的原因是（）

A.①地受热带风影响小

B.①地坡度平缓，土层深厚

C.②地为阴坡，光照条件差

D.②地海拔高，热量条件差