They hoped they ___ leave here immediately.
A.will
B.shall
C.should
D.would
答案:D
自由下落物体的高度h(米)与下落时间t(秒)的关系为h=4.9t2.有一钢球从44.1米高的建筑物上自由下落,它到达地面需要多长时间?
患者,女,48岁。既往体健,B超发现肝脏左叶占位。为明确诊断应首选的血清学检查是().
A.AFP
B.CA125
C.CEA
D.CA19-9
E.CA24-2