皮皮学，免费搜题
登录
搜题
【简答题】
如图所示,水平固定一截面为正方形绝缘方管的长度为L,空间存在场强为E、方向水平向右的电场和磁感应强度为B、方向竖直向下的磁场.将带电量为+q的小球从左侧管口无初速释放,已知小球与管道各接触面间动摩擦因数均为μ,小球运动到右侧时速度为v,该过程 A. 兹小球做功为 qvBL B. 电场小球做功为qEL C. 系统因摩擦而产生的热量为μmgL D. 系统因摩擦而产生的热量为qE l - mv 2 A. B. C. D.
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】离退休综合征名词解释离退休综合征
【单选题】What does the sentence 'Well, l just did!' mean?
A.
I just did something for the boy andhe would be happy.
B.
I just bought a nice doll for myself and I would be happy.
C.
I just bought a present for Grandma and she would be happy.
D.
I just did something for the boy and it would make me happy.
【单选题】— Hey! Kelin. Happy new year! _____. — It is good. My grandma kept cooking and cooking, so I just kept eating. [ ]
A.
How was your holiday?
B.
How is your grandma?
C.
Where did you go for holiday?
D.
What did you do in your holiday?
【简答题】离退休综合征
【简答题】离退休综合征的概念。
【单选题】听力原文：M: Hi，Sis. I just came over to drop off the DVDs you wanted，and…Hey，wow!Where did you get all of this stuff? W: I bought it. So，what do you think of my new entertainment center?And the Widescreen...
A.
A digital camera
B.
A TV
C.
A stereo
D.
A DVD player
【单选题】—Hey, Peter, did you enjoy your party last night? —Definitely! The food there _____ delicious in particular.
A.
is tasted
B.
was tasting
C.
tasted
D.
tastes
相关题目：