皮皮学，免费搜题
登录
搜题
【单选题】
SS4 型电力机车主电路接地保护装置为有源保护系统， 即使( )时， 仍能保证接地继电器动作。
A.
(A)高电位接地
B.
(B)低电位接地
C.
(C)“0”电位接地
D.
(D)平均电位接地
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】来自下肢静脉的血栓，最可能栓塞的部位是（　）
A.
支气管静脉
B.
支气管动脉
C.
肺静脉
D.
肺动脉
E.
下腔静脉
查看完整题目与答案
【单选题】The people in the office suddenly started working because________.
A.
they saw a stranger in the office
B.
their morning break was ended
C.
no one wanted to talk to Marie
D.
the boss was about to arrive
查看完整题目与答案
【简答题】主要用于注射用灭菌粉末的溶剂或注射液的稀释剂
查看完整题目与答案
【单选题】设〈 G,* 〉是群,且 |G|>1 ,则下列命题成立的是 ( )
A.
G 中有幺元
B.
G 中有零元
C.
G 有生成元
D.
G 中除了幺元外还有其他幂等元
查看完整题目与答案
【单选题】The people in the office suddenly started working because ______.
A.
they saw a stranger in the office
B.
they had finished their morning break
C.
no one wanted to talk to Marie
D.
the boss was about to arrive
查看完整题目与答案
【多选题】关于循环群,下列说法正确的是( )。
A.
循环群＜a＞是交换群，即循环群中必有a^i乘以a^j等于a^j乘以a^i，其中i，j∈Z。
B.
循环群＜a＞中的元素都是a的方幂的形式。
C.
循环群＜a＞中，a的一个方幂是生成元当且仅当a的这个方幂的阶等于a的阶。
D.
若G为群，a∈G，a的阶等于7，则a生成的循环群＜a＞的阶也等于7。
查看完整题目与答案
【单选题】设G是群，e是单位元，a，b，c∈G，则下面关于群的性质描述错误的是
A.
若ab=b，则必有a=e
B.
若b≠c，有可能ab=ac
C.
G有唯一的幂等元
D.
aG=Ga
查看完整题目与答案
【单选题】Music is      , and I like my music teacher, too. He’s      .
A.
interesting; fun            
B.
boring; tall               
C.
difficult; old
查看完整题目与答案
【简答题】The people in the office suddenly started working because______. [A] they saw a stranger in the office [B] their morning break was ended [C] no one wanted to talk to Made [D] the boss was about to arr...
查看完整题目与答案
【单选题】Neither my father nor my mother ______ rock music. They think that it's too ______. [     ]
A.
like; noise
B.
likes; noise
C.
like; noisy
D.
likes; noisy
查看完整题目与答案
相关题目：
【单选题】来自下肢静脉的血栓，最可能栓塞的部位是（　）
A.
支气管静脉
B.
支气管动脉
C.
肺静脉
D.
肺动脉
E.
下腔静脉
查看完整题目与答案
【单选题】The people in the office suddenly started working because________.
A.
they saw a stranger in the office
B.
their morning break was ended
C.
no one wanted to talk to Marie
D.
the boss was about to arrive
查看完整题目与答案
【简答题】主要用于注射用灭菌粉末的溶剂或注射液的稀释剂
查看完整题目与答案
【单选题】设〈 G,* 〉是群,且 |G|>1 ,则下列命题成立的是 ( )
A.
G 中有幺元
B.
G 中有零元
C.
G 有生成元
D.
G 中除了幺元外还有其他幂等元
查看完整题目与答案
【单选题】The people in the office suddenly started working because ______.
A.
they saw a stranger in the office
B.
they had finished their morning break
C.
no one wanted to talk to Marie
D.
the boss was about to arrive
查看完整题目与答案
【多选题】关于循环群,下列说法正确的是( )。
A.
循环群＜a＞是交换群，即循环群中必有a^i乘以a^j等于a^j乘以a^i，其中i，j∈Z。
B.
循环群＜a＞中的元素都是a的方幂的形式。
C.
循环群＜a＞中，a的一个方幂是生成元当且仅当a的这个方幂的阶等于a的阶。
D.
若G为群，a∈G，a的阶等于7，则a生成的循环群＜a＞的阶也等于7。
查看完整题目与答案
【单选题】设G是群，e是单位元，a，b，c∈G，则下面关于群的性质描述错误的是
A.
若ab=b，则必有a=e
B.
若b≠c，有可能ab=ac
C.
G有唯一的幂等元
D.
aG=Ga
查看完整题目与答案
【单选题】Music is      , and I like my music teacher, too. He’s      .
A.
interesting; fun            
B.
boring; tall               
C.
difficult; old
查看完整题目与答案
【简答题】The people in the office suddenly started working because______. [A] they saw a stranger in the office [B] their morning break was ended [C] no one wanted to talk to Made [D] the boss was about to arr...
查看完整题目与答案
【单选题】Neither my father nor my mother ______ rock music. They think that it's too ______. [     ]
A.
like; noise
B.
likes; noise
C.
like; noisy
D.
likes; noisy
查看完整题目与答案