钢结构涂料的耐盐雾时间一般为（）。A、100～200h B、300～400h C、2_爱下问搜题

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问题单项选择题

钢结构涂料的耐盐雾时间一般为（）。

A、100～200h

B、300～400h

C、200～400h

D、500～600h

答案

参考答案：C

问答题

将水加热，观察实验现象，判断是何变化？

单项选择题

Questions 14-23

·Look at the ten statements for this part.
·You will hear a story about communication through time.
·Decide whether you think each statement is right(R), wrong(W) or not mentioned(NM).
·You will listen to it twice.
·Mark your answers on the Answer Sheet.

When Andrew was approaching his house, he was nervous and worried.

A．Right

B．Wrong

C．Not Mentioned