皮皮学，免费搜题
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【单选题】
下列哪项叙述不是载体必须具备的条件?( )
A.
具有某些标记基因
B.
能够在宿主细胞中复制
C.
决定宿主细胞的生存
D.
有一个或多个限制酶切点
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
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举一反三
【单选题】The key on the table when I leave.
A.
was left
B.
will be left
C.
be left
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【单选题】在Word中,当多个已命名的文档打开时,关于保存这些文档的说法中正确的是( )。
A.
用“文件”选项卡中的“保存”命令，只能保存活动文档
B.
用“文件”选项卡中的“保存”命令，可以重命名保存所有文档
C.
用“文件”选项卡中的“保存”命令，可一次性保存所有打开的文档
D.
用“文件”选项卡中的“全部保存”命令保存所有打开的文档
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【单选题】When underway in a channel, you should keep to the ____.
A.
 middle of the channel
B.
starboard side of the channel
C.
port side of the channel
D.
side of the channel that has the widest turns
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【单选题】站在墙外的人,可以听到墙的另一侧有人谈话,但看不到谈话人,这是因为
A.
声波能发生衍射,而光波根本不能衍射
B.
声波是纵波容易发生衍射,而光波是横波不容易发生衍射
C.
声波的波速较小易于衍射,而光波的波速大难于衍射
D.
声波的波长较长衍射现象明显,而光波的波长非常短衍射现象不明显
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【单选题】When did the speaker finish his lunch?
A.
At 5:30.
B.
At 6:30.
C.
At 7:00.
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【单选题】When you open the lid of the box,a clown .
A.
pops out
B.
pops on
C.
pops off
D.
pops into
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【单选题】_______ cold weather it was when we were in England!
A.
What
B.
What an
C.
How
D.
What a
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【单选题】在北美基督教徒大约占人口总数的包分之多少?
A.
90.0
B.
80.0
C.
70.0
D.
60.0
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【单选题】When do people in Britain usually go to restaurant?
A.
Every day.
B.
When they feel too tired to cook.
C.
When they celebrate a birthday or an anniversary.
D.
When they feel sick.
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【单选题】Johnson ______ for 5 years for political reasons when he was young.A．was put in prisonB．was in t
A.
19. Johnson ______ for 5 years for political reasons when he was young. A．was put in prison
B.
was in the prison
C.
out in prison
D.
was in prison
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相关题目：
【单选题】The key on the table when I leave.
A.
was left
B.
will be left
C.
be left
查看完整题目与答案
【单选题】在Word中,当多个已命名的文档打开时,关于保存这些文档的说法中正确的是( )。
A.
用“文件”选项卡中的“保存”命令，只能保存活动文档
B.
用“文件”选项卡中的“保存”命令，可以重命名保存所有文档
C.
用“文件”选项卡中的“保存”命令，可一次性保存所有打开的文档
D.
用“文件”选项卡中的“全部保存”命令保存所有打开的文档
查看完整题目与答案
【单选题】When underway in a channel, you should keep to the ____.
A.
 middle of the channel
B.
starboard side of the channel
C.
port side of the channel
D.
side of the channel that has the widest turns
查看完整题目与答案
【单选题】站在墙外的人,可以听到墙的另一侧有人谈话,但看不到谈话人,这是因为
A.
声波能发生衍射,而光波根本不能衍射
B.
声波是纵波容易发生衍射,而光波是横波不容易发生衍射
C.
声波的波速较小易于衍射,而光波的波速大难于衍射
D.
声波的波长较长衍射现象明显,而光波的波长非常短衍射现象不明显
查看完整题目与答案
【单选题】When did the speaker finish his lunch?
A.
At 5:30.
B.
At 6:30.
C.
At 7:00.
查看完整题目与答案
【单选题】When you open the lid of the box,a clown .
A.
pops out
B.
pops on
C.
pops off
D.
pops into
查看完整题目与答案
【单选题】_______ cold weather it was when we were in England!
A.
What
B.
What an
C.
How
D.
What a
查看完整题目与答案
【单选题】在北美基督教徒大约占人口总数的包分之多少?
A.
90.0
B.
80.0
C.
70.0
D.
60.0
查看完整题目与答案
【单选题】When do people in Britain usually go to restaurant?
A.
Every day.
B.
When they feel too tired to cook.
C.
When they celebrate a birthday or an anniversary.
D.
When they feel sick.
查看完整题目与答案
【单选题】Johnson ______ for 5 years for political reasons when he was young.A．was put in prisonB．was in t
A.
19. Johnson ______ for 5 years for political reasons when he was young. A．was put in prison
B.
was in the prison
C.
out in prison
D.
was in prison
查看完整题目与答案