横跨梁安全链吊座剩余厚度小于()时更换。
A、5mm
B、6mm
C、8mm
D、10mm
参考答案:A
—Would you mind my _ _ here?
— . You can sit here if you like. [ ]
A. sit; Yes, of course
B. sitting; Certainly not
C. to sit; Certainly not
D. sitting; Yes, of course
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