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【单选题】
焊接（）钢时，不得进行预热。A.
45
B.
12CrlMoV
C.
1Crl 8 Ni 9 Ti
D.
18MnMoNb
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皮皮学刷刷变学霸
举一反三
【单选题】You should give up smoking because it is bad for you.
A.
try
B.
agree
C.
quit
D.
decide
【单选题】To decide whether you can successfully transplant a tree yourself, you should ______.
A.
select your location carefully
B.
measure the ball of earth around the tree roots
C.
measure the diameter of the tree trunk
D.
cut off as many taproots as you can reach
【简答题】________ you decide to take up you should try to make it a success. A) Whatever B) Unless C) Whenever D) If only
【单选题】______ you decide to take up, you should try to make it a success.
A.
Whatever
B.
Unless
C.
Whenever
D.
If only
【单选题】__________ you are old enough to judge things, you should decide your path in life.
A.
Since
B.
In order that
C.
Though
D.
Unless
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