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【判断题】
通过节流阀的流量与节流阀门的通流面积成正比。A.
正确
B.
错误
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举一反三
【单选题】—What's this in English? — _____. [ ]
A.
No, it isn't
B.
It's a orange
C.
It's a pencil case
D.
They're eggs
【简答题】设A，B为两个事件，且已知概率P(A)=0.4，P(B)=0.3，若事件A，B相互独立，则概率P(A+B)=______．
【单选题】According to the passage, elephant can do many things EXCEPT ______.
A.
elephants can help people to drive the invaders out of the country
B.
elephants also have been trained to carry heavy goods through the forests
C.
throughout history, people have prized elephants for their great size and strength
D.
beautifully decorated elephants still play a significant role in traditional religious ceremonies
【单选题】The students are _______ to know that elephants can walk quietly on tiptoe.
A.
surprising
B.
surprised
C.
frightening
D.
frightened
【单选题】Did the experiment find any difference_____ what children have learned? [ ]
A.
in hopes of
B.
in case of
C.
in terms of
D.
in time of
【简答题】设A，B为两个事件，且已知概率P( )=0.7，P(B)=0.6，若事件A，B相互独立，则概率P(AB)=______。
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