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【单选题】
以下哪种物质在PCR反应中 不需要A.
Taq DNA聚合酶
B.
dNTPs
C.
Mg 2+
D.
RNA酶
E.
合适pH缓冲液
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举一反三
【单选题】Where's the book I gave you? What ________ it?
A.
did you do with
B.
have you done with
C.
had you done with
D.
do you do with
【单选题】I often thought of my childhood, ____ I lived on a farm.
A.
which
B.
when
C.
where
D.
who
【单选题】--- What ______ when I phoned you? --- I ______ my work, and I was about to go out．
A.
have you done; finished
B.
were you doing; have finished
C.
did you do; had just finished
D.
were you doing; had just finished
【单选题】---What have you done ______the bananas? ---I have given them away.
A.
at
B.
in
C.
with
D.
on
【单选题】根据马斯洛的需要层次理论,下列说法不正确的是
A.
人类的需要依照由低到高不断递进的顺序分为若干个层次
B.
只有当较高层次的需要得到满足之后，较低层次的需要才会出现并要求得到满足
C.
层次越低的需求，其强度越大
D.
层次越高的需求，其强度越弱
【简答题】党的十九大报告指出,创新是引领发展的第一动力。下列关于创新发展说法正确的是( )1创新是建设现代化经济体系的战略支撑,是发展的基点2创新发展是关系国计民生的根本性问题,是全党工作的重中之重3坚持创新发展,必须把创新摆在国家发展全局的核心位置4创新发展注重的是解决发展不平衡的问题A. ①② B. ②③ C. ③④ D. ①③
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