将支架拖下车盘时，必须用规定的卸车绞车绳拉住支架底座（）。
A.后方
B.左方
C.前方
D.右方
参考答案：C
－Do you remember the days we worked on the farm?
－Certainly. Especially the hard times _ _ we spent together. [ ]
A．which; when
B．when; which
C．when; when
D．which; which
铁锈色痰常见于大叶性肺炎的
A．充血水肿期
B．红色肝变期
C．灰色肝变期
D．溶解消散期
E．中毒性休克
