搜题请搜索小程序“爱下问搜题”
问题 不定项选择

A、B是某电场中一条电场线上的两点，一正电荷仅在电场力作用下，沿电场线从A点运动到B点，速度图象如图所示。下列关于A、B两点电场强度E的大小和电势φ的高低的判断，正确的是[ ]

A．EA>EB

B．EA<φB

C．φA<φB

D．φA>φ B

答案

AC

选择题

周末,小陈同学陪妈妈逛商场,看到下图的情景,向妈妈解释了产生这一情景的下列几种原因,其中合理的是(　　)

A．不正当竞争引起洗衣机市场的混乱

B．洗衣机供过于求致使商家争抢客源

C．洗衣机质量优劣决定其销售量大小

D．劳动生产率提高降低了洗衣机价格
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填空题
从方框中选择适当的词语填空。
have a look at,  at a very good price,  on sale,  
in blue,  I'm sorry,  how much,  buy…from,  
in all colors,  come down to,  sells…to…
1. The boy __________ is my brother.
2. This shop has sweaters __________.
3. Boys can __________ T-shirts __________ this shop.
4. Please __________ my home and have dinner with us.
5. We have shoes __________.
6. This store __________ school things __________ the students.
7. Can I __________ your family photo?
8. The white pants are _____________ for $20.
9. —What time is it? —Oh, __________. I don't have a watch.
10.—__________ are the red socks? —They are $5.
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