铁座与轨底间设置轨距块,与缓冲调距块相结合,可实现-8―﹢4mm的调高量,调距精度为()
A.0.5mm
B.1mm
C.1.5mm
D.2mm
参考答案:B
1897年德国强占
A.广州湾
B.胶州湾
C.新界
D.大连
The doctor insisted that the patient _______ seriously ill and that an operation _______ in no time.
A.was; be carried out
B.should be; be carried out
C.was; was carried out
D.should be; was carried out