加工箱体曲线槽用的成型刀,应选______刀具材料。
A.W18Cr4V
B.YT30
C.YT5
D.YW1
参考答案:A
—Miss Wang, I haven't seen you for a long time. ______
—I went to Beijing to visit my grandparents. I stayed there for five days. [ ]
A. How did you go?
B. Where are you going?
C. When will you go?
D. Where did you go?
一位60岁男性患者,高血压史已五年。2小时前在劳动时突发剧烈头痛,在急诊室时,检查血压为23.4/13.6kPa(180/105mmHg),神清,右上、下肢肌力Ⅱ级,右侧痛觉明显减退。入院后,血压未再波动,但神志转入昏迷、瞳孔左]右,左侧瞳孔对光反应消失,颈稍强,右侧肢体仍未见活动,右侧Babinski征(+),左侧Gordon征(+)。
为了迅速诊断,最适宜的辅助检查是:()
A.脑超声波
B.腰椎穿刺
C.颅脑CT
D.EEG
E.SPECT