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【多选题】
下列不属于高脉冲重复频率的技术是A.
每秒重复发射超声次数增多
B.
取样线上可有两个以上取样容积
C.
无信号混迭
D.
检测高速血流能力提高
E.
不间断发射超声
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举一反三
【单选题】What is the opinion from the man's parents?
A.
Job satisfaction is more important.
B.
A high salary is always more important.
C.
Work environment is more important.
D.
Job security is always more important.
【单选题】The doctor asked the child's parents ______ .
A.
what is the problem
B.
what was the problem
C.
what the problem was
【单选题】What is the significance for the parents of young drug users to focus their efforts on pot smoking*
A.
Marijuana is the illegal drug most used by kids.
B.
Pot smoking may directly lead to the use of cocaine and heroin by young people.
C.
The withdrawal from pot smoking contributes to abandoning other drugs.
D.
This is the way they found effective to make contributions to society.
【单选题】What is the Chinese newspapers' attitude to the parents described in this article?
A.
Sympathetic.
B.
Critical.
C.
Approving.
D.
Neutral.
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