阅读理解。
Dear Tom,
How are you? I'm in a new school this term. And I'm writing to you in my school now.
My new school is big and nice. There are one thousand and four hundred students and one
hundred and forty teachers in my school. I like the teachers. They are very kind to me.
My classmates are very friendly, too. They teach me Chinese and I teach them English.
There are trees, flowers and green grass (青草) in my school. They are very beautiful.
Behind my school there is a small river. The water in it is quite clean. We can swim in
it.
We have no classes on Saturdays or Sundays. Sometimes I go to play football or
basketball with my classmates. Sometimes I stay at home and watch TV. Sometimes I go
to shops with my father and mother. We all like China.
Please write to me soon!
1. ack is in a _____ school. [ ]
A. English
B. Chinese
C. small
D. Japanese
2. There are _____ students and _____ teachers in Jack's school. [ ]
A. 1,400; 104
B. 1,040; 104
C. 1,400; 140
D. 1,040; 140
3. Jack's teachers _____. [ ]
A. teach him English very well
B. only teach him Chinese and English
C. don't like him at all
D. are quite good to him
4. Jack _____ his new classmate. [ ]
A. don't get on well with
B. don't like
C. makes good friends with
D. is going to learn English from
5. Which is right?[ ]
A. Jack goes to school every day.
B. Jack doesn't have classes every day.
C. Jack has no classes only on Saturdays.
D. Jack has no classes only on Sundays.
能代替聚苯乙烯，它是由乳酸聚合而成的，这种材料可以在乳酸菌的作用下降解。下列关于乳酸的说法正确的是[ ]