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
A. 对
B. 错
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