问题 选择题

2006年8月24日,国际天文学联合会大会投票5号决议,冥王星被排除在行星行列之外,冥王星正式从九大行星中除名,而将其列入“矮行星”。冥王星的发现当时是根据

A.哥白尼日心说的推算

B.牛顿理论的推算

C.法拉第学说的计算

D.爱因斯坦对时间、空间属性的揭示

答案

B

哥白尼日心说只是解释太阳和地球的关系;法拉第学说是有关电磁感应关系的;爱因斯坦对时间、空间属性的揭示是20世纪初的重大科学成就,此时海王星已经发现。主要是根据牛顿的万有引力定律测算的。

选择题
阅读理解

Everyone knows that exercise is important. We all need to exercise. Doctors say it is good for us. It makes your heart and body strong. Children who often exercise are more alert (灵活). This means they do better in tests and schoolwork than those who don’t exercise.

There are many ways to exercise. You can walk, run, swim, skate, or play ball games. Make sure you exercise in the following ways; you have to like what you’re doing. Exercise enough— but not too much. It’s best to exercise twice each week, Thirty minutes each time is enough. Try all kinds of things until you find one, two or even three sports that feel right for you.

You can exercise at fitness centers. They have a lot of equipment(设备)there. The equipment will help to exercise your arms, legs and other parts of your body to make you fit. Some people buy equipment for their homes. But it is very expensive.

Exercising can be fun. Friends can exercise together at a fitness center or they can play sports together. How do you exercise?

小题1:In the text, the writer tells us that we all need to         .

A.drink

B.sleep

C.exercise

D.work小题2:Which of the following sports is not mentioned (提到) in the next?

A.Fishing

B.Running

C.Swimming

D.Walking小题3:The words “fitness centers” in the next mean         .

A.商务中心

B.健身中心

C.购物中心

D.医疗中心小题4:The sentence, Children who often exercise are more alert, tells us that people who often exercise can do better in         .

A.running

B.skate

C.swim

D.studies小题5:Exercising can be fun, because         .

A.it makes your heart and body strong

B.it makes you study better

C.people can buy equipment for their home

D.friends can play sports together