如图所示,匀强电场场强E=100V/m,A、B两点相距10cm,A、B连线与电场

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问题:

如图所示,匀强电场场强E=100V/m,A、B两点相距10cm,A、B连线与电场线夹角为60°,则UBA之值为(  )

A.-10V

B.10V

C.-5V

D.5V

考点:电势差与电场强度的关系
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大量蛋白尿的标准()

A.≥50mg/(kg·D.

B.>100mg/(kg·D.

C.>150mg/(kg·D.

D.>150mg/d

E.>2000mg/d

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胚胎发育过程中,黄斑中心凹出现于()

A.胚胎5个月

B.胚胎6个月

C.胚胎7个月

D.胚胎8个月

E.胚胎9个月

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Dear Dr Fang,

How are you? I am writing to ask for some   36  about how to help my 15-year-old son. At the moment, he refuses to do almost anything his mother and I ask him to do. He is our only child and we treat him very   37 . Though his grandparents buy him many things, yet he is still   38  to them and often shouts at them. He also   39  to spend time with us or do as we tell him.

Recently, he has been refusing to do his homework, and instead insists on   40  his time listening to foreign music. I cannot understand that   41 , and I don’t like it. Meanwhile, he spends too much time in Internet cafes, where he either plays games   42  chats on the Internet. He is wasting valuable time during this   43  period in his life!

What shall I do? I am worried about it.   44  I keep allowing him to do what he wants, he may fail at school, or worse. How can I help my son   45  hurting our feelings?

Best regards

Liu Zhen     

小题1:A  questions      B  advice      C  problems      D  lessons

小题2:A  badly      B  ill          C  well        D  coldly

小题3:A  kind          B  good      C  polite        D  rude

小题4:A  prefers       B  wants       C  likes        D  refuses

小题5:A  saving        B  missing     C  wasting      D  winning

小题6:A  music         B  film      C  game       D  play

小题7:A  and           B  or         C  but         D  so

小题8:A  dark         B  old       C  sad        D  important

小题9:A  If            B  Until        C  Though      D  Before

小题10:A  for           B  in          C  without       D  about

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注册集体商标的目的是防止他人在其他商品上使用相同或相似商标并获得注册,混淆商品的来源、冒牌影射和侵权。

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有时,统计调查表和统计分组表的项目有相同的名称。( )

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