在座舱高度达到多高时,后排气活门会自动关闭()
A.10000英尺
B.12000英尺
C.14500英尺
D.20000英尺
参考答案:C
I don’t want to borrow Kent’s big bicycle because I am too small to ride()
A.that bicycle of him
B.that bicycle of his
C.mat his bicycle
D.his that bicycle
下列沉降缝、伸缩缝说法正确的是()
A、沉降缝、伸缩缝、防震缝的基础都可不断开
B、沉降缝、伸缩缝、防震缝的基础都要断开
C、沉降缝是从基础底面到层顶所有部分全部断开
D、伸缩缝和沉降缝合并设置时基础也可不断开