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问题 多项选择题

下列负荷中为三级负荷的是( )。

A．中断供电将在经济上造成较大损失 、
B．中断供电将造成经济损失
C．中断供电时，连续生产过程被打乱需较长时间才能恢复
D．室外消防用水量为20L/s的露天堆场消防用电设备

答案

参考答案：B,D

完形填空

词汇运用（本题有10小题， 每小题1分，共10分）

阅读短文，根据中文填写适当的单词，使意思完整，每空一词。

People are often killed while crossing the road. Most of ___1____ (他们) are old people and children. Old people are often killed because they usually can’t see or hear very  well . Children are often killed because they are ____2____(粗心的). People should ___3_ __（看）and listen before they cross the road.  A car, truck __4____（或者） bus can’t stop very quickly if it is going very fast. It will travel many ____5___(米) before it stops. People don’t always know this. They think a car can stop right away. The faster a car is traveling, the ___6___(长的) it takes to stop. It’s ___7___ （困难的）for a person to know how fast a car is traveling. The only safe way to ___8_____(穿过) the road is to look at both ways, right and ___9___（左边） .The correct way to cross the road is to walk quickly when the traffic ____10____（灯） turn green. It’s not safe to run.
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单项选择题

（）不是菊花的识别要点。

A、常为草本

B、叶互生，无托叶

C、浆果，顶端常有冠毛或鳞片

D、头状花序，有总苞，雄蕊5个，聚药雄蕊
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