循环水系统中的风吹损失一般用符号()表示。
A、E
B、D
C、F
D、B
参考答案:B
Under the environment of fierce competition, the only way John could imagine _____ pressure was
to work harder by making greater efforts.
A. handling
B. to handle
C. handled
D. having handled
旧纯毛非结织的栽绒地毯(块状)