在正常腹平片上，不能显影的软组织影是()
A．肾脏
B．肝脏
C．肾上腺
D．腰大肌线
E．胰腺
参考答案：C, E
能使各种色光全部反射的不透明体的颜色是白色的．______． （判断对错）
I _____ a book when it began to rain that evening.[ ]
A. read
B. have read
C. was reading
D. would read
