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【单选题】
供体菌株为 Hfr arg - leu + azi S str S ,受体菌株为 F - arg + leu - azi R str S 。为了检出和收集重组体 F - arg + leu + azi R ,应用下列哪一种培养基完成这一任务?A.
基本培养基加链霉素
B.
基本培养基加叠氮化钠和亮氨酸
C.
基本培养基加叠氮化钠
D.
不加精氨酸和亮氨酸，加链霉素的选择培养基
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【单选题】The Oriental Pearl TV Tower is _________ all Shanghai citizens. [ ]
A.
famous for
B.
familiar to
C.
pleased with
D.
interested in
【简答题】阅读理解。 When we look to the east of Shanghai, we are sure to see a beautiful tower, especially in the evening when the lights are on. That is the Oriental Pearl TV Tower. The Oriental Pearl TV Tower is ...
【单选题】以现金清偿债务的，债务人应当在满足金融负债终止确认条件时，将清偿债务的账面价值与实际支付现金之间的差额计入（ ）。
A.
资本公积
B.
营业外收入
C.
投资收益
D.
其他收益
【单选题】听力原文：W: Did you visit the television tower when you had your vocation in Shanghai last summer? M: I couldn't make it last June, but I finally visited it two months later. I planned to visit it again s...
A.
He will visit the TV tower in June.
B.
He has visited the TV tower twice.
C.
He saw the big tower he visited on TV.
D.
He has visited the tower once.
【简答题】基本模数为______mm。整个建筑物及建筑物的一部分以及建筑组合体的模数化尺寸通常是基本模数的______倍。
【单选题】听力原文：W: Did you visit the Television Tower when you had your vacation in Shanghai last summer? M: I couldn't make it last June. But I finally visited it two months later. I plan to visit it again some...
A.
He has visited the TV Tower twice.
B.
He will visit the TV Tower in June.
C.
He has visited the TV Tower once.
D.
He saw the big tower he visited on TV.
【多选题】继电器是一种电子控制器件，继电器具有控制系统(又称输入回路)和被控制系统(又称输出回路)，实际上是用较小的电流去控制较大电流的一种“自动开关”，常用的型号有( )等。
A.
热继电器
B.
中间继电器
C.
时间继电器
D.
速度继电器
E.
动作继电器
【单选题】Standing on the top of the Oriental Pearl TV Tower, ______ a good bird’s–eye view of Shanghai city.
A.
it will be
B.
you will get
C.
there will be
D.
it will have
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