如图所示,在平面镜前有A、B两光点,人站在镜什么位置观察A、B两点恰好重叠。用作图方法,求出人眼所在位置。
There _____ an English evening party next month. [ ]
A. was
B. had
C. is going to have
D. is going to be
一期止血缺陷常用的筛检试验是
A.PT、APTTB.BT、PLTC.BT、PTD.APTT、PLTE.BT、CT