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【多选题】
船舶出租人和承租人签订一份航次租船“订租确认书”，下列( )内容一般应包括在订租确认书中。A.
装卸港名称
B.
交还船时间和地点
C.
运费和支付方法
D.
合同范本
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举一反三
【判断题】DNA repair cannot be done without breaking the phosphodiester backbone of DNA.
A.
正确
B.
错误
【单选题】Which of the following enzymes cannot catalyze the formation of a phosphodiester bond?
A.
endonuclease
B.
RNA polymerase
C.
DNA polymerase
D.
ligase
E.
none of the choices are correct.
【单选题】The final phosphodiester bond between the fragments is made by .
A.
DNA ligase
B.
DNA pol Ⅲ
C.
DNA pol Ⅰ
D.
DNA primase
【单选题】发电机电压等级为10kV的发电厂，其升高电压侧电力网电压等级为110kV，应选用额定电压变比为（）的双绕组升压变压器。
A.
35/11kV
B.
38.5/6.3kV
C.
121/38.5/6.3kV
D.
110/38.5/11kV
E.
121/6.3kV
F.
121/10.5kV
【单选题】Which of the following would prevent the formation of a phosphodiester bond in DNA?
A.
removal of a nitrogen from one of the bases
B.
removal of oxygen from carbon 2 of the sugar
C.
removal of an oxygen from carbon 3 of the sugar or removal of the phosphate from the gamma position of the nucleoside triphosphate
D.
removal of the phosphate from the alpha position of the nucleoside triphosphate
E.
removal of the phosphate at the beta position of the nucleoside triphosphate
【单选题】Once the two fragments are joined, the final sealing phosphodiester bond is formed by
A.
Polymerase
B.
exonuclease
C.
Transcriptase
D.
Ligase
【单选题】发电机电压等级为6 kV 的发电厂,其升高电压侧电力网电压等级为 110kV ,应选用额定电压比为 ___________ 的双绕组升压变压器。
A.
35 ／ 11kV
B.
38.5 ／ 6.3kV
C.
121 ／ 38.5 ／ 6.3kV
D.
121 ／ 6.3kV
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