She_____that it was a trick to get her involved in the matter, for she knew them too well.

A．doubted

B．suspected

C．conceived

D．convinced

在电镜制样技术中，通常用的技术有（）技术，由此获得的切片厚度一般为40-50nm；（）技术主要用来观察膜断裂面上的蛋白质颗粒的膜表面形貌特征。