外源性凝血系统较为灵敏和最为常用的筛选试验是()
A.APTT
B.PT
C.CT
D.血小板计数
E.血块收缩试验
参考答案:B
At the opening ceremony, the chairman ______ a speech to welcome the guests from more than twenty centuries.
A.delivered
B.spoke
C.said
D.stated
2009版保养制度中规定,ZF转向机所用润滑油的型号为()。
A、ZF专用油EcofluidX
B、长城GL-5重负荷齿轮油
C、00#或000#极压锂基脂
D、美孚ATF220