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【单选题】
圆锥面被倾斜于轴线的平面截切得到的截交线形状是( )A.
圆
B.
椭圆
C.
抛物线
D.
双曲线
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【单选题】浮筒式气体(瓦斯)继电器内部有两个浮筒,当上浮筒上的接点闭合时其作用是报警,当下浮筒上的接点闭合时,其作用是()。
A.
使断路器跳闸
B.
接通控制网络
C.
接通中间继电器
D.
报警
【单选题】He was angry when he heard the news. He was angry ______ the news.
A.
with hearing
B.
in hearing
C.
on hearing
D.
for hearing
【单选题】The angry passenger ______.
A.
was polite when he was talking to the agent
B.
didn't know who he was
C.
didn't want to wait to rebook ticket
D.
was very surprised when he knew to rebook ticket
【单选题】According to Paragraph 2, when a dog hunts a rabbit, he is______.A．happyB．angry##
A.
According to Paragraph 2, when a dog hunts a rabbit, he is______. A．happy
B.
angry
C.
aggressive
D.
anxious
【简答题】The mother is________ (extreme) angry with her son when she hears that he didn-t passthe exam．
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