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【判断题】
若两条直线空间垂直,且其中有一条直线平行于某一投影面,则两直线在该投影面上的投影一定相互垂直。A.
正确
B.
错误
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举一反三
【单选题】The rate of room 202 is lower than ___
A.
that of room 908
B.
room 908
C.
that room
D.
this one of room 908
【单选题】Where is the announcement being heard?
A.
In a garden.
B.
In a private office.
C.
In a dining hall.
D.
On a train.
【简答题】— Who is John Smith? — He is the speaker____________ heard last week. A.which we would have B.we would have C.we D.we had
【单选题】Questions 23 to 25 are based on the conversation you have just heard.
A.
The man has sent the order to the woman by mistake.
B.
Some of the telephone systems don’t work properly.
C.
Some of the packs do not contain any manuals.
D.
The quality of the goods is not up to the standard.
【单选题】Beethoven ______ after be heard their talking.
A.
went on playing
B.
stood up and left
C.
was happy
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