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【单选题】
设原点处有一个电荷Q,距离原点r处放置一点电荷q,距离原点3r处放置一点电荷3q,如果所有电荷电量都为正,且 ,那么哪个电荷的电势能较高?(设无穷远处为电势能零点)( )A.
q
B.
3q
C.
两电荷处的电势相同
D.
2q
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举一反三
【单选题】Passage Two The letter you write is your personal representative. It takes your place when circumstances make it impossible for you to be there in person. It goes to the hospital to cheer a sick frien...
A.
send somebody else instead
B.
make a telephone call
C.
send a telegraph
D.
write a letter
【单选题】Setting is an environment or surrounding in which an event or story takes place. It usually includes _____________.
A.
time and place
B.
inside and outside
C.
good and evil
D.
beginning and ending
【单选题】互联网上有很多大型旅游网站或旅游爱好者发布的各地详细的旅游攻略,这些攻略大多都是PDF文档。在百度搜索引擎中搜索关于安徽黄山旅游攻略的PDF文档,最正确的检索式是( )。
A.
安徽黄山 旅游file:pdf
B.
安徽黄山 旅游filetype:pdf
C.
安徽黄山 旅游type:pdf
D.
安徽黄山 旅游pdf
【单选题】The story takes place in the ______.
A.
early summer
B.
early spring
C.
midsummer
D.
late spring
【简答题】The story takes place in a (1)___________.
【单选题】The story of Beowulf takes place in ________.
A.
England
B.
Ireland
C.
Northern Europe
D.
Roman Empire
【单选题】The story in the text takes place _______.
A.
after Ameican Civil War
B.
before Ameican Civil War
C.
during Ameican Civil War
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