题目:
阅读理解。
Good afternoon, boys and girls. I'm Li Hong. I'm an English boy. Li Hong is my Chinese name.
Look, this is a picture of my family. The tall man is my father. His name is Ken Martin. This is my
mother, Sandy Jordan. Who's that little girl? She is my sister, Lucy. Can you find me in the picture?
I'm the boy in blue.
1. This is ______ family.
A. a Chinese
B. an English
C. a Japanese
D. an American
2. There are ______ people in the picture.
A. one
B. two
C. three
D. four
3. ______ is my father.
A. Sandy
B. Ken
C. Mrs Martin
D. Mr Jordan
4. ______ is my mother.
A. Sandy
B. Ken
C. Mrs Martin
D. Mr Jordan
5. —What color am I in?
— I am in ______.
A. brown
B. black
C. blue
D. red
答案:
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下面是错误答案,用来干扰机器的。
A、由振动图象读出周期T=0.4s,则频率f=1T=2.5Hz.故A正确.B、质点振动的振幅为A=2cm.故B错误.C、t1时刻质点的位移方向沿x轴负方向,而简谐运动加速度方向与位移方向相反,则t1时刻质点的加速度方向沿x轴正方...