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【单选题】
如果两个实体之间的联系是M:N，则实现1:M联系的方法是A.
将两个实体转换成一个关系
B.
将两个实体转换的关系中，分别加入另一个关系的主码
C.
将“1”端实体转换的关系的主码，放人“M”端实体转换的关系中
D.
将“M”端实体转换的关系的主码，放人“1”端实体转换的关系中
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举一反三
【单选题】以下有关输液的叙述不正确的是
A.
需长期输液者，一般从远端静脉开始
B.
需大量输液时，一般选用较大静脉
C.
连续24小时输液时，应每12小时更换输液管
D.
输入多巴胺应调节较慢的速度
E.
颈外静脉穿刺拔管后在穿刺点加压数分钟，避免空气进入
【单选题】—________ did you work for this company? —About 10 years. [ ]
A.
How often
B.
How far
C.
When
D.
How long
【简答题】How does the author feel about his work? [A] It is boring. [B] He is happy with his work. [C] He doesn't want to stay in his work place.
【单选题】－_______ is it from your work place? －About thirty minutes’ drive.
A.
How long
B.
How far
C.
How soon
D.
How often
【单选题】下列方法中，（ ）不是增大差分放大器共模抑制比的方法。
A.
双端输出时，使电路尽可能对称
B.
单端输出时，e极增加电阻
C.
采用带恒流源的差分对电路
D.
增大c极电阻
【简答题】who live and work in countries it deals with—how they think about, behave, and
【单选题】How does the author feel about his work? 查看材料
A.
It is boring．
B.
He is happy with his work．
C.
He doesn't want to stay in his work place．
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