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【单选题】
某一类高层办公楼的自备柴油发电机房,设置电动启动雨淋阀组的水喷雾灭火系统保护。当该 系统的火灾探测装置动作后,打开雨淋报警阀组,压力开关动作,联锁启动消防水泵,水雾喷头 喷水灭火。该系统采用的火灾探测装置应该是( )。A.
气动传动管探测装置
B.
液动传动管探测装置
C.
感烟感温火灾探测装置
D.
喷头驱动传动管探测装置
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举一反三
【单选题】Which of the sentences below best expresses the essential information in the highlighted sentence in the passage(Paragraph 2)? Incorrect choices change the meaning in important ways or leave out essen...
A.
Stability, a feature of the biological clock's period, depends on changeable factors such as temperature.
B.
A major feature of the biological clock is that its period does not change despite significant changes in the environment.
C.
A factor such as temperature is an important feature in the establishment of the biological clock's period.
D.
Biological activity is not strongly affected by changes in temperature.
【单选题】Which of the following ways of product promotion is NOT mentioned in the text?
A.
a. Contacting possible customers by telephone.
B.
b. Advertising it on billboards.
C.
c. Using direct marketing mailshots.
D.
d. Advertising it on radio.
【单选题】某乳母，能量摄入量为2800kcal、蛋白质90g、维生素B10.8mg、维生素 B21.7mg、尼克酸18mg，该膳食可能会引起新生儿
A.
佝偻病
B.
克汀病
C.
低体重
D.
脚气病
E.
癞皮病
【简答题】Conversation is the most ___1___ ( 社交 ) of all human activities. And it is an activity only of humans. However ___2____( 复杂 ) the ways in which animals communicate with each other, they do not ___3___...
【简答题】某乳母，能量摄入量为2800kcal、蛋白质90g、维生素B10.8mg、维生素B21.7mg、尼克酸l8mg，该膳食可能会引起新生儿（ ）。
【单选题】Which of the following ways of product promotion is NOT mentioned in the text?
A.
Contacting possible customers by telephone.
B.
Advertising it on billboards.
C.
Using direct marketing mailshots.
D.
Advertising it on radio.
【单选题】某乳母，能量摄入量为2800kcal、蛋白质90g.维生素Bi0. 8mg.维生素B21. 7mg.尼克酸18mg，该膳食可能会引起新生儿
A.
佝偻病
B.
克汀病
C.
低体重
D.
脚气病
E.
癞皮病
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