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【简答题】
在一个带正电附近，放一个带正电的点电荷q 0 ，测得q 0 所受力为F，试问F/q 0 是大于、等于还是小于该点的场强E?如果带负电则又如
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举一反三
【单选题】--________ do you have PE? –Every Monday, Wednesday and Friday.
A.
How often
B.
How long
C.
How many times
D.
What time
【单选题】I waved to see him off and watched the train until it disappeared . [ ]
A.
at a distance
B.
from a distance
C.
in the distance
D.
within a distance
【简答题】How do dreams help us?They help us look at ______ in our daily life.
【单选题】When ( ) the airport, she waved again and again to us.
A.
leaving
B.
left
C.
having left
D.
having been leaving
【单选题】--_________do you have PE lessons? --Three times a week.
A.
How long
B.
How soon
C.
How many
D.
How often
【单选题】— _____________ do you have PE? — Twice a week. [ ]
A.
How many
B.
How much
C.
How often
D.
When
【单选题】Nobody tells us ______, can you help? [ ]
A.
how we should do
B.
how to do it
C.
what to do it
【单选题】I waved to Nancy, but she was ______ in her thoughts, and made no response.
A.
involved
B.
stuck
C.
absorbed
D.
interested
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