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【单选题】
有两个弹簧,质量忽略不计,都是10cm 。第一个弹簧上端固定,下挂一个质量为m 的物体后,长11cm ,而第二个弹簧上端固定,下挂一质量为m 的物体后,长13cm ,现将两弹簧串联,上端固定,下面仍挂一质量为m 的物体,则两弹簧的总长为A.
4cm
B.
20cm
C.
22cm
D.
24cm
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举一反三
【单选题】The teacher favors the style of his writing instead of the ___ .
A.
context
B.
content
C.
contest
D.
contain
【简答题】Instead of Criticizing Elise for what she had: done, the teacher praised her______ (high).
【单选题】___________, I have never seen anyone who’s as wise as John.
A.
As long as I have traveled
B.
Now that I have traveled so much
C.
.As I have traveled so much
D.
Much as I have traveled
【单选题】Why did Jessica become a librarian instead of a teacher?
A.
Because there were a lot of choices for women.
B.
Because she happened to be offered the chance.
C.
Because being a librarian is a glamour profession.
D.
Because she had lost her teaching credential.
【单选题】The teacher recommended that Jack______ math or physics instead of English because he was quick at numbers.
A.
must study
B.
could study
C.
study
D.
studied
【单选题】A good teacher should encourage his students to ____ the knowledge by themselves instead of just copying and memorizing what the teacher said in class.
A.
expand
B.
observe
C.
digest
D.
react
【单选题】_____, I have never seen anyone who's as capable as John. [ ]
A.
As long as I have traveled
B.
Now that I have traveled so much
C.
Much as I have traveled
D.
As I have traveled so much
【单选题】The teacher favors the style of his writing instead of the ___ .
A.
contain
B.
contest
C.
content
D.
context
【单选题】Instead of __________ for the teacher to explain, they try to find the patterns and the rules for themselves.
A.
wait
B.
to wait
C.
waiting
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