机械传动挖掘机严禁()作业。

题型:填空题

问题:

机械传动挖掘机严禁()作业。

考点:机动车驾驶员考试厂内机动车辆驾驶员厂内机动车辆驾驶员题库
题型:填空题
从方框中所给的选项中选出能填入空白处的最佳选项,补全短文,其中有一项为多余选项。
      March 20th is World Water Day every year. According to a report from the United Nations, more than
half of the world's major rivers have serious water loss and are polluted.
      The Yellow River, the world's fifth longest river, watered some of the oldest farms on earth. But now it
has a serious problem. 1_______ In most of the past 35 years, it didn't reach the sea.
      The Nile in Egypt, running 6, 650 km, is the longest river in the world. 2_______ Now it is down to 2
billion m' or so. Australia's Murray River reaches the sea only every other year. One fifth of America's Rio
Grande has no water, either. 
     3_______    
     Mostly it's damming (筑坝) and global warming that make rivers dry. 
     4_______ Now about 45, 000 of them lie across the world's rivers. They hold back around 15% of the
world's fresh water from running to the sea.
     Global warming is making things worse. Warmer weather takes water away. The glacier (冰川) are
becoming smaller. 5_______ Global warming has had certain effects on water sources (源头). Droughts
(干旱) happening around the world make people pay more attention to this fact. 
  
A. Dams hold water to irrigate (灌溉) fields and make power.
B. The source of the Yellow River is drying up because of it.
C. It used to carry 32 billion m' of water a year.
D. How does it happen?
E. Factories pour waste water into rivers directly.
F. Its source on Qinghai-Tibet Plateau is drying up.
1.________2.________3.________4.________5.________
题型:填空题

M胆碱受体激动药的作用包括()

A.减慢心率

B.舒张血管

C.腺体分泌增加

D.瞳孔缩小

E.胃肠平滑肌收缩

题型:填空题

【问题4】

如果想制作自签的证书且使用已有的钥匙,需要在/usr/share/ssl/certs目录中键入 (11) 命令,接着用户将会看到如图7-17所示的输出信息。

当用户输入口令字后,系统就会要求输入所要制作的自签证书的用户信息。用户信息填写完成后,自签的证书将被创建在 (12) 文件中。生成该证书后,重新启动安全服务器就可使该证书生效。

假设用户小郭的万维网服务器域名www.wg_gcz.org,要测试自签的证书,需在浏览器中输入的URL是 (13)

题型:填空题

大理石平板在使用时注意事项()。

A.测量时可在平板上磨擦工件以去除毛刺

B.可在平台上敲打

C.可用水进行平台清洁

D.使用前要擦干净平台表面,禁止磨擦、敲击,使用后最好用平台腊保养

题型:填空题

经验主义学派主张力求减少决策中的个人艺术成分,建立一套决策程序和数学模型来增加决策的科学性。

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