皮皮学,免费搜题
登录
搜题
【单选题】
梳过头发的梳子能够吸引轻小物体,这个现象与以下哪个物理原理有关
A.
静电感应
B.
静电极化
C.
万有引力
D.
尖端放电
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
【单选题】下列基团中,属于邻、对位定位基的是(  )。
A.
–COOH
B.
–NH 2
C.
–CN
D.
–CHO
【单选题】The old man ____ down by a truck is being saved now.
A.
knocking
B.
to knock
C.
knocked
D.
being knocked
【单选题】下列基团中,属于邻、对位定位基的是( )
A.
–COOH
B.
–OH
C.
–NO2
D.
–CHO
【单选题】Some (old beautiful) Italian oil paintings (are being) (displayed) in the (exhibition hall).
A.
old beautiful
B.
are being
C.
displayed
D.
exhibition hall
【单选题】Don't shout at the old man.They should ____.
A.
respect
B.
be respected
C.
respected
D.
being respected
【单选题】下列基团中,属于邻、对位定位基的是
A.
-CN
B.
-COOH
C.
-Br
D.
-NO2
【单选题】下列基团中,属于邻、对位定位基的是:
A.
— NH 2
B.
— NO 2
C.
— CHO
D.
— COOH
【单选题】his old age,we didn’t invite him to climb the mountains with us. [     ]
A.
To consider
B.
Being considered
C.
Considering
D.
Considered
【多选题】下列基团中,属于邻、对位定位基的是( )
A.
–OH
B.
–OCH 3
C.
–CHO
D.
–Cl
【简答题】adv. being old and therefore valuable