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【单选题】
A vessel or object being towed astern shall display a(n) ______.
A.
forward masthead light
B.
after masthead light
C.
stern light
D.
All of the above
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【单选题】若差分电路两输入电压分别为Vi1=10 mV,Vi2=6mV,则Vid和Vic分别为( ) mV 。
A.
2    4
B.
2    8
C.
4    2
D.
4    8
【单选题】Early this year, thousands of migrant _______ workers cancelled their insurance due to the lack of _______ policy to transfer insurance between difference regions.
A.
the; the
B.
the; a
C.
/; the
D.
/; a
【单选题】Should a person be overcome due to lack of oxygen and high concentration of refrigerant, treat with_____.
A.
fresh water
B.
fresh air
C.
salt water
D.
artificial respiration
【判断题】Primitive men, due to lack of such entertainments as modern men have, easily got bored.()
A.
正确
B.
错误
【单选题】The UN Climate Change Conference in Copenhagen was held in a tense ______ due to lack of deep understanding.
A.
atmosphere
B.
state
C.
situation
D.
phenomenon
【单选题】M13 单链噬菌体的复制分为三个阶段,以下哪一项不属于此()
A.
SS→RF
B.
RF→RF
C.
RF→SS
D.
SS→SS
【单选题】 国际乒乓球联合会的总部设在( )。
A.
北京
B.
新加坡
C.
瑞士
D.
荷兰
【单选题】牛排馆属于()
A.
中餐
B.
快餐
C.
西餐
D.
小吃
【单选题】Nowadays there are still a number of students school at various grades due to a lack of money in some poorer areas. [     ]
A.
  leaving out
B.
  making out
C.
  letting out
D.
  dropping out
【单选题】在中国普通西餐馆中流行的牛排多数都属于___风味。
A.
美式
B.
英式
C.
俄式
D.
法式
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