问题 选择题
某同学通过Internet查询到“神舟”六号飞船在圆形轨道上运行一周的时间大约为90分钟,他将这一信息与地球同步卫星进行比较,由此可知(   )
A.“神舟”六号在圆形轨道上运行时的向心加速度比地球同步卫星小

B.“神舟”六号在圆形轨道上运行时的速率比地球同步卫星小

C.“神舟”六号在圆形轨道上运行时离地面的高度比地球同步卫星低

D.“神舟”六号在圆形轨道上运行时的角速度比地球同步卫星小

答案

答案:C

阅读理解

阅读理解。

        In England, afternoon tea, taken between four and five, is the most informal (非正式) meal of the day.

If you are a friend of the family, you may drop in for tea without an invitation or telling that you are coming.

Very often it is not served at a table. The members of the family and visitors take tea in the sitting-room.

Each person has a cup and saucer (托盘), a spoon (汤匙) and a small plate for bread-and-butter and cake.

By the way, do not help yourself to cake first; bread-and-butter first, then cake if there is any. Another piece

of advice: Do not put more than one piece of bread or cake on your plate at the same time.

1. Afternoon tea is usually served with _______.

A. tea only

B. tea and some food

C. tea, dessert and meat

D. cake and bread

2. If you want to have afternoon tea in a friend's home, _______.

A. it is necessary for you to send a message

B. you should wait for his invitation

C. it is impolite for you to go there without taking anything with you

D. it is unnecessary for you to call him or send a message

3. In the passage, "drop in" means "_______".

A. pay an informal visit

B. fall down

C. drink at a friend's home

D. break

4. It's impolite for you _______.

A. help yourself to cake first

B. share a cup with your friend

C. put more than one piece of bread or cake on your plate once

D. all of the above

5. Which of the following is NOT true?

A. Afternoon tea is often taken in the sitting-room.

B. The members of the family often share a cup and saucer, a spoon, etc.

C. Afternoon tea is usually taken between lunch and supper.

D. Help yourself to bread-and-butter before cake if there is any.

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