皮皮学，免费搜题
登录
搜题
【简答题】
分离度 R 和相对保留值 r 21 ,这两个参数中哪一个更能全面地说组分的分离情况?为什么?
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：
.
..
皮皮学刷刷变学霸
举一反三
【简答题】We couldn't help when we heard the news that we were going to have a three-day holiday.
查看完整题目与答案
【判断题】DNA 半不连续复制是复制时一条链的合成方向是 5′→3′ ,而另一条链的合成方向是 3′→5′ 。( )
A.
正确
B.
错误
查看完整题目与答案
【判断题】DNA 半不连续复制是指复制时一条链的合成方向是 5’→3’ ,另一条链的合成方向为 3’ →5’
A.
正确
B.
错误
查看完整题目与答案
【单选题】图示结构中的二力构件(杆重不计)为 。
A.
AB杆
B.
BD杆
C.
AE杆
D.
AD杆
查看完整题目与答案
【判断题】DNA半不连续复制是复制时一条链的合成方向是5’—3’,另一条则是3’—5’。
A.
正确
B.
错误
查看完整题目与答案
【判断题】DNA半不连续复制是指复制时一条链的合成方向是5'→3'，而另一条链的合成方向为3'→5'。(    )
A.
正确
B.
错误
查看完整题目与答案
【单选题】We couldn't help _____when we heard the hero's story.
A.
moving
B.
to move
C.
to be moved
D.
being moved
查看完整题目与答案
【单选题】We couldn't read the notice on the board because several people were standing______it.
A.
in front of
B.
in the front of
C.
at the back of
D.
in back of
查看完整题目与答案
【单选题】your help, we couldn't complete the work in time, I am afraid.
A.
If not
B.
Without
C.
Have we not had
D.
If we had not been
查看完整题目与答案
【单选题】We couldn't find the foreign boy anywhere. He____.
A.
has gone
B.
is gone
C.
went
D.
gone
查看完整题目与答案
相关题目：
【简答题】We couldn't help when we heard the news that we were going to have a three-day holiday.
查看完整题目与答案
【判断题】DNA 半不连续复制是复制时一条链的合成方向是 5′→3′ ,而另一条链的合成方向是 3′→5′ 。( )
A.
正确
B.
错误
查看完整题目与答案
【判断题】DNA 半不连续复制是指复制时一条链的合成方向是 5’→3’ ,另一条链的合成方向为 3’ →5’
A.
正确
B.
错误
查看完整题目与答案
【单选题】图示结构中的二力构件(杆重不计)为 。
A.
AB杆
B.
BD杆
C.
AE杆
D.
AD杆
查看完整题目与答案
【判断题】DNA半不连续复制是复制时一条链的合成方向是5’—3’,另一条则是3’—5’。
A.
正确
B.
错误
查看完整题目与答案
【判断题】DNA半不连续复制是指复制时一条链的合成方向是5'→3'，而另一条链的合成方向为3'→5'。(    )
A.
正确
B.
错误
查看完整题目与答案
【单选题】We couldn't help _____when we heard the hero's story.
A.
moving
B.
to move
C.
to be moved
D.
being moved
查看完整题目与答案
【单选题】We couldn't read the notice on the board because several people were standing______it.
A.
in front of
B.
in the front of
C.
at the back of
D.
in back of
查看完整题目与答案
【单选题】your help, we couldn't complete the work in time, I am afraid.
A.
If not
B.
Without
C.
Have we not had
D.
If we had not been
查看完整题目与答案
【单选题】We couldn't find the foreign boy anywhere. He____.
A.
has gone
B.
is gone
C.
went
D.
gone
查看完整题目与答案