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【单选题】
在信道的加性噪声分类中,下列哪种噪声不属于从噪声的性质上划分的是( )A.
噪声
B.
脉冲干扰
C.
天电噪声
D.
起伏噪声
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举一反三
【单选题】What is the relationship (关系) between Mr. Rance and John?
A.
They are boss and secretary.
B.
They are teacher and student.
C.
They are friends.
【单选题】Whom did Mr. Black buy presents for?
A.
His boss.
B.
The son of his boss.
C.
Mr.Black's wife.
【单选题】As teachers we should concern ourselves with what is said, not what we think ______
A.
ought to be said
B.
must say
C.
have to be said '
D.
need to say
【单选题】Our boss, Mr. Thompson, ______ a raise in salary for ages, but nothing has happened yet.
A.
was promising
B.
has been promising
C.
promised
D.
has promised
【简答题】你洗衣服的时候 , 在一边的三岁小女儿竟喝了一些漂白水 , 这个时候你应该采取什么样的应急措施 ?
【简答题】As teachers we should concern ourselves with what is said, not what we think ________. A) ought to be said B) must say C) have to be said D) need to say
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