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【单选题】
用反转录法合成目的基因时，必须有（）参与A.
限制性内切酶和DNA连接酶
B.
限制性内切酶和DNA聚合酶
C.
逆转录酶和DNA连接酶
D.
逆转录酶和DNA聚合酶
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】完形填空。 My home town is a beautiful place. It stands beside a wide river 1 the foot of low green hills. It has many fine buildings and wide streets. There 2 trees and flowers 3 . But it has not always b...
【简答题】The building stands as the last remaining __________ of the town's cotton industry.
【简答题】It's March and we are back to school. It's good to see all my classmates and teachers again. They are all fine and happy. We are in Grade Six this term. Mr. Zhou is our new English teacher and Miss Li...
【简答题】We would like to see closer ________ between parents and schools. (doing something together or working together towards a shared aim)
【单选题】毕业生享有某项就业权益,并不意味着
A.
用人单位若侵害该项权益,就必然面临法律责任的承担
B.
在该项权益上拥有权益边界范围内的自由
C.
在该权益范围内,享有要求他人不能妨碍自身权益实现的权利
D.
该项权益没有“边界”,可以无限制地行使权益
【单选题】--Good morning, sirs. What can I do for you? --We are the （）. We would like to see your captain.
A.
PSC inspectors
B.
chief officer
C.
second officer
D.
third officer
【单选题】That grand--sized pine tree ______ the horizon.
A.
stands up well against
B.
stands out good to
C.
stands out well against
D.
stands up good to
【单选题】课后练习14.We discussed the plan that we would like to see ________ the next week.
A.
carry on
B.
carrying out
C.
carried out
D.
to carry out
【单选题】The town stands on the south side of the ______ road to London.
A.
top
B.
main
C.
quick
D.
leading
【单选题】On the top of the hill _________ the old man once lived.
A.
a temple stands there in which
B.
stands a temple where
C.
a temple standing on which
D.
does a temple stand where
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