______for the timely investment from the public, our company would not be so booming now.

A．Had it not been

B．were it not

C．If it was not

D．Be it not

女性排卵期HCG检测时，为避免交叉反应，应选择的试验是 （）

A.β-HCG单克隆二点酶免疫法

B.乳胶凝集抑制稀释试验

C.乳胶凝集抑制试验

D.α-HCG单克隆抗体试验

E.血凝抑制试验