心脏疾病最基本的检查方法是（）
A.多排CT
B.MRI
C.X线平片
D.超声心动图
E.心血管造影
参考答案：C
— Hello. May I speak to Tom?
— I'm sorry. You ____ the wrong number. There's no one here by that name. [ ]
A. may have
B. must have
C. must have had
D. would have had
怎样提高农药的防治效果？
