阅读理解。
When Mencius (孟子) was a small boy, his father died. So Mencius and his mother were quite poor.
One day, Mencius returned home from school and found his mother making some cloth. It was very
beautiful and expensive.
"How much of your book have you read today?" Mencius' mother asked him. Mencius threw down
his book. "I haven't read any of it." He replied, "I played with some friends of mine in the fields."
When his mother heard this, she picked up a pair of scissors (剪刀) and cut the cloth. "Why have
you cut your cloth?" Mencius asked, "It was so beautiful and now you've wasted it." "You have wasted
your time," she said, "Now I have wasted mine. Look at the terrible (可怕的) thing we have done!"
Mencius learned a lot from this lesson. After this, he always studied hard.
1. When did the story happen?[ ]
A. When Mencius was 30 years old.
B. When Mencius' family was very rich.
C. When Mencius' father lived with them.
D. When Mencius was a small boy.
2. The phrase "make some cloth" means "______". [ ]
A. 做衣服
B. 织布
C. 纺棉花
D. 缝衣服
3. Why did Mencius' mother cut the cloth? Because ______. [ ]
A. She wanted to make some more beautiful cloth
B. She thought it was wasting time to make cloth
C. She wanted to let her son get angry
D. She wanted to give her son a lesson
4. Why did Mencius always study hard after this? Because ______. [ ]
A. he wanted to be a teacher
B. he learned a lot from the lesson
C. he wanted to make his mother happy
D. he didn't play with any other friends
5. This passage mainly tells ______. [ ]
A. A story of Mencius and his friends
B. a story of Mencius' mother
C. a story about Mencius' wasting time
D. Mencius' mother cut the cloth
F1为500N，货物在1min内匀速上升了5m。（1）请在图上画出绳子的绕法；