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【判断题】
炉膛内发生爆燃必须满足以下三个条件:1炉膛或烟道中有一定的可燃物和助燃空气存积;2存积的燃料和空气混和物符合爆燃比例;3具有足够的点火能源或温度。( )A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】康明斯电控柴油机电控系统元器件的导通性是指两触针之间电阻小于一定数值的电气连接。对于线束导线而言,此技术规范小于 ( ) 欧姆。
A.
30
B.
10
C.
5
D.
1
【单选题】Why does Mrs. Jacobs criticize Mr. Holland in the clip ?
A.
Because he was late for class very often.
B.
Because he was off work earlier very often.
C.
Because he failed to serve as a good compass for his students.
D.
Because he failed to give his students a good class.
【简答题】Ricky kept his arm round her w_________ to show how deep he loved her.
【单选题】Why does Mrs. Jacobs criticize Mr. Holland in clip 1?
A.
Because he was late for class very often.
B.
Because he was off work earlier very often.
C.
Because he failed to serve as a good compass for his students.
D.
Because he failed to give his students a good class.
【单选题】Ricky's embarrassment when he met his teachers was _______; his ears turned bright red and he kept looking down on the ground.
A.
obvious
B.
acute
C.
keen
D.
severe
【单选题】After ________ his right arm, he keep on ________ with his left arm.
A.
lose; write
B.
losing; writing
C.
losing; write
D.
lose; writing
【单选题】太阳投射到地球上的能量,是当前全世界能耗的1万倍。如果光电转化效为10%,我们只要利用( )的太阳能,就能满足当前全世界能源的需要。
A.
1.0%
B.
2.0%
C.
0.5%
D.
0.1%
【单选题】Why does Mrs. Jacobs criticize Mr. Holland in clip 1( 视频 1)?
A.
Because he was late for class very often.
B.
Because he was off work earlier very often.
C.
Because he failed to serve as a good compass for his students.
D.
Because he failed to give his students a good class.
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