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【单选题】
磁感应强度B=F/IL(B-磁感应强度，F-导体所受电磁力，I-导体中的电流，L-导体的有效长度)所反映的物理量间的依赖关系是( )。A.
B由F、I和L决定;
B.
F由B、I和L决定;
C.
I由B、F和L决定;
D.
L由B、F和I决定。
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【单选题】Mr. Smith wrote a ________ paper and won the price.
A.
three-thousand-words
B.
Three-thousands-words
C.
three-thousand-word
D.
Three-thousand’s-words
【单选题】Mr. Smith required that each of his students a composition every week.
A.
writing
B.
to write
C.
write
D.
wrote
【简答题】Mr.Smith works in an office. He’s very busy 小题1: .Every evening, when he comes back from his office, he’s always tired and wants to go to bed early. 小题2: .She doesn’t stop talking until she falls asle...
【单选题】Mr. Smith wrote a _______ paper and won the price.
A.
three-thousand-words
B.
three-thousands-words
C.
three-thousand-word
D.
three-thousand’s-words
【单选题】Mr. Smith wrote about the country () it was twenty years ago.
A.
when
B.
as
C.
while
D.
so
【简答题】简述CSS相对定位及其特点。
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