我国特高压线路建设的三纵是指（）。A.锡盟～南京 B.陕北～株洲_爱下问搜题

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问题多项选择题

我国特高压线路建设的三纵是指（）。

A.锡盟～南京

B.陕北～株洲

C.张北～南昌

D.蒙西～长沙

答案

参考答案：A, C, D

填空题

用方框中所给单词或词组的正确形式填空。

so. . . that... , until, through, please, outside, matter, kill, feel, at last, look up

1.  There are many ______ class activities in our school and I'm in the  singing group.
2.  Does it ______  if he goes there by bike by himself? He's so little, you know.
3.  Although it was a boring lesson, I had to sit ______ it.
4.  Ten people ______ in last week's car accident.
5.  He was ______  tired ______ he fell asleep in class.
6.  He didn't leave ______  he heard the bell ring.
7.  The teacher ______  with what we have done in class.
8.  I sometimes ______  the new words in my e-dictionary if I meet with any.
9.  Ice ______ cold and hard.
10.  He worked hard and succeeded in his business ______.

问答题简答题

计算题：氧化期使[C]从0.6%降到0.2%，若脱碳速度为每分钟0.04%，需多长时间？若每降低0.1%的C温度上升20℃，则脱碳结束后温度升高多少度？