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【单选题】
entrepreneurA.
入口，进入
B.
企业家
C.
大胆的，有上进心的
D.
企业家的，创业者的
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举一反三
【单选题】Look! This is my new room, and that’s ______.
A.
John and his brother’s
B.
John's and his brother’s
C.
John and his brother
D.
John's and his
【单选题】Look! This is my new room, and that’s ______.
A.
John and his brother’s
B.
John's and his brother’s
C.
John and his brother
D.
John's and his
【单选题】After that, I found Morrie Schwartz, my25 professor, 25.
A.
lovely
B.
precious
C.
happy
D.
favorite
【单选题】I ____ a precious book in a used book store. It became an important source of reference for my paper.
A.
Stumble into
B.
Stumbled over
C.
Stumbled upon
D.
Stumble upon
【单选题】—Henry, ________ the light is ________ when you leave the lab. —All right. [ ]
A.
be sure; turned on
B.
make sure; turned off
C.
sure; turning off
D.
make sure; turning off
【单选题】I filmed a lot of precious moments including Annie's first dance performance.
A.
正确
B.
错误
【单选题】原核生物DNA复制与RNA转录之间的不同点是( )。
A.
新链的合成均以碱基互补配对的原则进行
B.
RNA聚合酶缺乏校正功能
C.
合成方向均为5′→3′
D.
合成体系均需要酶和许多蛋白质因子
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