空气弹簧装车前须进行600kPa风压试验,保压()漏泄量不超过10kPa。
A.5min
B.10min
C.15min
D.20min
参考答案:C
She was good at physics _________she found it boring.
A.despite
B.in spite of
C.in spite the fact that
D.despite the fact that
在高层建筑及工业建筑中,常采用()来满足结构对基础和地基的要求。
A.天然地基
B.人工地基
C.软土地基
D.块土混凝土地基