下列()电气设备是正常状态下和故障状态下产生的火花或热效应均不能点燃爆炸性混合物的电

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问题:

下列()电气设备是正常状态下和故障状态下产生的火花或热效应均不能点燃爆炸性混合物的电器设备。

A.正压型

B.隔爆型

C.本质安全型

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单词拼写(共10小题;每小题1分,满分10分)

56. He c___________ his speech with some amusing remarks and then left.

57. Mr. White has a___________ a big surprise party for his wife’s birthday.

58. He can a_____________ more work in a day than anyone else I know in the company.

59. His first speech as president made a deep i___________ on his audiences.

60. He is o____________ and he can take positive action even when faced with difficulties.

61. Who was the ____________(先前的)owner of the old house?

62. He was brave enough to ___________(揭露) the corrupt official’s crimes.

63. The football match was so exciting that it __________(使激动)all the football fans.

64. Several _____________ (热情的) young teachers have just started working at the school.

65. The entrance is in ____________(经常的) use; do not block it.

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信息系统有哪些病毒防范制度?

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离心脱水过程可以采用两种不同的原理:()和离心沉降法。

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带有传动装置的截止阀应()管路上。

A、斜立安装在垂直

B、斜立安装在水平

C、直立安装在水平

D、直立安装在垂直

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简易酸溶血试验是诊断

A.地中海贫血重要依据

B.6-磷酸葡萄糖脱氢酶缺乏重要依据

C.再生障碍性贫血重要依据

D.阵发性睡眠性血红蛋白尿症重要依据

E.不稳定HB病重要依据

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