热收缩处理后，板件背面的防腐层会遭到破坏，防腐处理是必不可少的
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Our next borad meeting will focus ______ the benefits for the empolyees.
A. on
B. at
C. with
D. by
The report gives a _________ picture of the company's future development .
A. central
B. clean
C. clear
D. pleasant
To finish this project , _________ we need is time and money
A. that
B. what
C. which
D. the one
People can get _____________ necessary from the Internet.
A. all of the informations
B. all pieces of informations
C. all the information
D. all informations
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