阅读理解。
We drink tea every day. But more than three hundred years ago, most of the people in Europe (欧洲)
did not know anything about tea. Some people heard about it, but very few of them know what to do
with it.
There is a story about an English sailor (水手) who went to countries in the east, the west and the
south. He went to India and China. One day he came home and brought some tea as a present for his
mother. She told her friends about the present and asked them to a "tea party". When her friends came
to the tea party, the old man offered (提供) the brown tealeaves (茶叶). The old woman's friends began
to eat them. Of course, nobody liked the tealeaves.
At that time the sailor came in. He looked at the table and said, "What have you done with the tea?"
"I boiled (煮) it, as you said. " "And what did you do with tea?" "I threw it away, of course." answered
the old man.
"Now you may throw away the leaves, too." said her son.
1.Most of the people in Europe _________.
A. drank tea every day 300 years ago
B. drink tea every day
C. know nothing about tea
D. like to eat tea leaves
2.One day the sailor brought his mother some tea from _________.
A. countries in the west
B. countries in the south
C. India or China
D. a tea shop in England
3.The sailor's mother asked her friends to her house, because ________.
A. the sailor told her to
B. she wanted to ask her friends what to do with the tea
C. she liked to show off (炫耀)
D. she wanted to sample the tea together with her friends
4.At the tea party, _________.
A. all the woman's friends spoke highly of the tea
B. nobody knew what to do with the tea
C. the woman offered her friends some dried (干的) tea
D. the woman gave her friends each a glass of tea water
5.What mistake did the woman make?
A. She boiled the tea.
B. She did as the sailor said.
C. She poured away the water.
D. She didn't throw away the tea leaves.
，另一个是拉力F，对a图分析，前两秒，力F沿斜面向下，物体沿斜面向下加速，
，2秒末的速度
第三秒内F沿斜面向上，与重力平衡为匀速运动，速度不变，
，d图像前两秒与a同，2秒末的速度
，三秒末的速度
。分析b图，第一秒内拉力与重力平衡，物体静止，第二秒没有拉力，物体沿斜面向下加速
，第二秒末的速度
，第三秒拉力向下，加速度
，分析 c 图第一秒拉力0，物体向下匀加速
比较可得答案C对。