世界上有些国家吃辣椒很厉害，如墨西哥、印度、匈牙利、韩国……还有中国的某些省市

环境污染是当今社会的焦点话题之一．下列有关治理环境污染的方案中，你认为不合理的一项是（　　）

A．禁止使用化石燃料，以防温室效应加剧

B．开发燃煤脱硫技术，防止酸雨的形成

C．加大力度植树造林，治理土壤沙漠化

D．使用可降解塑料，减少白色污染源

阅读理解。

     Basketball is a young game. In the year of 1891, a famous college was having some trouble with its boy

students. The weather was bad. They couldn't play outside. So they were unhappy. Sometimes they even got

into fights.

     Finally, some teachers asked Dr. Naisimth to invent a game so that the students might have something to

play in doors.

     Dr. Naisimth thought for a few days and invented a kind of ball game. It was a fast, exciting game with

much moving and passing of the ball. It was played between two teams. In order to make a score, the ball had

to be thrown into a basket ten feet above the floor on the wall.

     At first, Dr. Naisimth had planned to have the ball thrown into a box. As he couldn't find boxes of the right

size, he had to use fruit basket instead. That is how the game got its name basketball. The history of this game

is over 100 years.

1. Basketball is ______ game.

A. a difficult

B. a young

C. an easy

2. Who invented the basketball game?

A. Dr. Naisimth.

B. Mr. Black.

C. Dr. Brown.

3. Basketball was invented for the students ______ in bad weathers.

A. to play happily in doors

B. to play outside

C. to fight in doors

4. Basketball game was played ______ at that time.

A. between two teams

B. among three teams

C. by a team

5. Basketball game has its history of ______ years now.

A.10

B. less than100

C. more than 100

回路的流体出入口应（）于管线。

A.垂直

B.平行

C.相对

D.相交

离心泵效率是指（）。

A.有效功率与轴功率之比

B.轴功率与有效功率之比

C.理论流量与实际流量之比

D.实际流量与理论流量之比