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【单选题】
不是有效市场细分的条件是( )。A.
可衡量性
B.
可赢利性
C.
竞争性
D.
可进入性
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举一反三
【单选题】- Bring me the bill, please. - _________
A.
You are welcome.
B.
Please wait for a moment, sir.
C.
I'll hurry up.
D.
Be quick.
【单选题】关于移位的特点,错误的是
A.
移位需要GTP提供能量
B.
移位是肽链延伸的最后一步
C.
核糖体沿mRNA移动与肽基-tRNA的移位两个过程是耦联的
D.
移位的过程是,每次核糖体向mRNA移动的密码子数随物种而变化
【简答题】Our is not on board, please wait a moment. I’ll call him back.
【单选题】My mother _____ Beijing in a few days. I wonder when the earliest plane _____ on Monday. [ ]
A.
leaves; takes off
B.
is leaving; takes off
C.
is leaving; is taking off
D.
leaves; is taking off
【单选题】I ______ Beijing for Shanghai in a few days. Do you know when the earliest plane ________?
A.
leaves; takes off
B.
am leaving; takes off
C.
leave; is taking off
D.
am leaving; is taking off
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