世界主要国家的标准代号分别是什么？_爱下问搜题

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问题问答题简答题

世界主要国家的标准代号分别是什么？

答案

参考答案：

国际标准：ISO；日本标准：JIS；美国标准：AISI、ASTM；英国标准：BS；德国标准：DIN；法国标准：NFA；前苏联标准：FOCT。

填空题

3.01×10²²个OH^-的物质的量为____________ ，含质子的物质的量为_________ ，这些OH^-与 __________molNH₃的质量相同。

补全对话，情景问答

补全对话。

A.and it snows sometimes.
B.What's the weather like in Shijiazhuang?
C.What's the temperature?
D.How do you know it?
E.Yes, you can.

A: What bad weather! It's rather cold, isn't it?
B: Yes, it is. 1.
A: It's about 7℃. We can't go out now.
B: Can I turn on the air-conditioner (空调)？
A: 2.           Are you from Shijiazhuang?
B: Yes, I am. It's a very beautiful place.
A: 3.
B: It's often warm and windy in spring. It's always hot in summer.
A: Is winter the coldest season (最冷的季节)？
B: Yes, 4.
A: Well, what's the weather like tomorrow here?
B: I think it's going to get better.
A: 5.
B: The radio says the temperature will stay about 13℃ and then the sun will come out later.