告警灯的主要作用是通过亮灯、闪烁的方式提醒监控人员发生了重要_爱下问搜题

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问题多项选择题

告警灯的主要作用是通过亮灯、闪烁的方式提醒监控人员发生了重要告警，下面关于告警及指示灯状态描述正确的是（）

A、活动告警－红灯－红色闪烁－响铃

B、确认告警－红灯－红色常亮－不响铃

C、清除告警－绿灯－绿色常亮－不响铃

D、无告警－绿灯－绿色常亮－不响铃

答案

参考答案：A, B, C, D

完形填空

阅读短文，从各题所给的四个选项中，选出一个正确答案。

     Water is the    1     of all the things we eat and drink. Not many people understand this but    2    .
quite true. The human body can go without     3   for a long time. We've got many examples for this.
Yet two     4   three days without water can usually make people     5    . Man can't live     6    water.
     Many people don't understand how    7    water the human body needs     8    work well, and many
people,especially young people, do not drink enough,     9    in very hot weather. Our body has mostly water,
about 65% to 75%. That is to say about two thirds of our body is water. When we do sports, some of the
water will get away from our body.     10     we don't drink some water, we won't have enough water.
And if we don't have enough water, we'll feel tired and many of us will get ill. So you know how important
water is to us.

( )1. A. important
( )2. A. it's
( )3. A. food
( )4. A. so
( )5. A. to die
( )6. A. have
( )7. A. many
( )8. A. and
( )9. A. even
( )10. A. If

B. most important
B. its
B. water
B. and
B. die
B. with
B. much
B. the
B. ever
B. For

C. more important
C. it
C. drink
C. but
C. to died
C. without
C. little
C. /
C. almost
C. Since

D. different
D. is
D. meat
D. or
D. died
D. in
D. few
D. to
D. hardly
D. Because

综合

读南美洲地图，完成下列各题。

（1）写出图中数字所代表的地理事物名称：

①________洋②________河③________（城市）

（2）②河流域分布着世界最大的________（森林类型）。

（3）巴西的农产品中，产量居世界第一位的有_______。（填字母）

A．小麦、玉米、大豆B．牛肉、羊毛、奶酪C．咖啡、甘蔗、柑橘D．水稻、花生、油菜

（4）巴西的面积、人口都居南美洲第________位。巴西的最大城市是______。