预处理5台罗茨风机转速是()。
A.980
B.1000
C.1500
D.1200
参考答案:A
Where _______ his bags? [ ]
A. is
B. are
C. /
D. isn't
“特里芬两难”是导致布雷顿森林体系崩溃的根本原因。