己内酰胺的主要化学性能有:水解反应、()和氧化反应。
A、还原反应
B、氯化反应
C、聚合反应
D、氦化反应
参考答案:B
阅读理解。
My name is Deng Hui. I’m a student. At school, I like English very much. My favourite colour is blue.
I like green, too. Because (因为) I like spring. My favourite food is rice and fish. I like playing basketball, because it is my favourite sport. I like swimming, too. Can you swim? The weather is hot in hometown (家乡) in summer. I don’t like it.
1. What is Deng Hui’s favourite colour?
A. red
B. blue
C. yellow
2. Deng Hui likes .
A. summer
B. autumn
C. spring
3. Den Hui’s favourite sport is .
A. basketball
B. football
C. singing
4. are Deng Hui’s favourite food.
A. Eggs and apples
B. Cakes and meat
C. Rice and fish
5. Deng Hui is .
A. a teacher
B. a student
C. English
压力容器()采取措施,仍不能得到有效控制时,应紧急停运。
A、工作压力或介质温度规定值
B、液位异常
C、过量充装
D、其他异常情况