我国生产安全事故总量大，重大、特大安全事故频繁发生。_爱下问搜题

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问题判断题

我国生产安全事故总量大，重大、特大安全事故频繁发生。

答案

参考答案：对

补全对话，情景问答

为下列句子选择答语。

( ) 1. How old are you?
( ) 2. When is your birthday?
( ) 3. How tall is Kim?
( ) 4. What are you wearing?
( ) 5. Can you play with me today?
( ) 6. Where do you live?
( ) 7. What's your address?
( ) 8. Is this a bus?
( ) 9. How do you go to school?
( ) 10. What's your favourite colour?

A. I like blue.
B. By bicycle.
C. Yes, it is.
D. My address is 942 Ninth Avenue.
E. I live in a house.
F. I don't know.
G. I'm wearing a shirt.
H. She is 1.3 metres tall.
I. December seventeenth.
J. I'm nineteen years old.

填空题案例分析题

下面是一水域生态系统在一年之内的能量流动情况资料（能流单位：kJ／m²．a）。请分析回答：

人类对生态系统的能量流动进行调查研究，其意义是（）。