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问题 选择题

我国某水厂被污染，附近1．4万居民出现腹痛，腹泻，头晕，恶心等症状，人们洗澡时全身刺痒，皮肤局部溃烂，这次事故造成了2万人不同程度的中毒，这件事直接说明[     ]

A．环境污染危害生态平衡 

B．环境污染危害人类健康 

C．环境污染直接制约着我国经济和社会的可持续发展 

D．我国环境污染的危害性十分严重 

答案

答案：B

填空题
     下面是李梅的一篇英文日记，但她有几个单词不会拼写，请你帮助她（请注意单词的适当形式，
每个空格限填一词）。
      May 27 Saturday                                                                                       1______ 
     I got up very 2______ (早) this morning. After a quick breakfast, I went to the zoo with
my classmates, We went there by 3______ (公共汽车). There are many kinds of animals there.
We liked monkeys best. We fed them with some 4______ (香蕉).We stayed there for about an
hour. Then we went to Qingshao Lake. We saw many people 5______ (放,飞) kites in
different colors near the lake, We had no kites, so we boating 6______ (代替). The water in
the lake is very clean.
     It was nearly 12 o'clock. We began to 7______ (喝) apple juice and eat some sandwiches
for lunch. After that, some of us went fishing, and some of us 8______ (爬) the hill. We went
back home at about 9______  (四) o'clock.
    What a happy day we had today I enjoyed 10______  (玩得开心) a lot!
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多项选择题

当系统发生不对称短路时，不会发生（）。

A.操作过电压

B.谐振过电压

C.反击过电压

D.工频过电压
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