吊钩开口达原尺寸的10%时应报废，其检验工具（）。
A、游标卡尺
B、千分尺
C、塞尺
参考答案：A
sometimes keeps her awake at night is Tom is getting more and more quiet at home.
A．That;which
B．It;that
C．Whether;what
D．What;that
如何对差压变送器进行密封性检查？
