气体液化循环所耗的功等于()、()的差值。
参考答案:压缩功;膨胀功
Don’t be nervous. Just speak _______ and pretend the microphone isn’t here.
A.obviously
B.slightly
C.naturally
D.strangely
当风速为20m/s时,根据经验,单锚泊出链长度与水深h关系为:()
A.3h+90m
B.3h+125m
C.4h+90m
D.4h+145m