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【单选题】
下列不属于市场研究观察法的最佳调查项目的是（）。A.
消费者的购买习惯
B.
广告效果
C.
商品陈列方法
D.
橱窗设计
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举一反三
【单选题】Our neighbor's car alarm is always _____ in the middle of the night. [ ]
A.
going off
B.
going out
C.
going away
D.
going down
【单选题】Our public debates often fly off into the wild blue yonder of fantasy. So it's been with the Federal Communications Commission's new media-ownership rules. We're told that, unless the FCC's decision i...
A.
he is in favor of it.
B.
his view is balanced.
C.
he is slightly critical of it.
D.
he is strongly critical of it.
【单选题】We were cut off from the outside world by the sudden flood; what’s worse, our food ______.
A.
was run out
B.
was running out
C.
has run out of
D.
has been run out
【单选题】Once an Okazaki fragment has been completed in E. coli , its RNA primer is removed by _________________ or RNase H1, and replaced with DNA by the polymerase; the remaining nick is sealed by DNA ligase
A.
DNA polymerase I
B.
DNA polymerase I I
C.
DNA polymerase I II
D.
DNA polymerase I V
【单选题】关于飞机的实用重心,下列说法哪些是正确的?
A.
飞行中先使用中央油箱燃油的目的是为了将飞机重心保持在飞机实用重心范围内。
B.
为了飞机的飞行安全，在任何时候装载飞机的重心都必须保持在实用重心范围之内。
C.
为了飞机的飞行安全，在飞行过程中飞机重心的位置都不能发生变化。
D.
在飞机起飞爬升过程中飞机重心的位置与巡航时不同，主要是因为飞机的姿态发生了变化。
【单选题】Our public debates often fly off into the wild blue yonder of fantasy. So it's been with the Federal Communications Commission's new media-ownership rules. We're told that, unless the FCC's decision i...
A.
he is in favor of it.
B.
his view is balanced.
C.
he is slightly critical of it.
D.
he is strongly critical of it.
【单选题】I'm too busy and tired recently. Let's ______ our party till next weekend. [ ]
A.
get off
B.
get on
C.
put on
D.
put off
【多选题】Mammals have many low-fidelity DNA polymerases of the translesion synthesis (TLS) polymerase family, including:
A.
DNA polymerase η (eta)
B.
DNA polymerase β
C.
DNA polymerase ι (iota)
D.
DNA polymerase λ
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