Researchers agreed that the study of new treatments for heart attack patients was extremely important but that more research was needed to determine whether balloon angioplasty preceded by ultrasound is any better for heart attack patients than is the balloon procedure by itself.


that more research was needed to determine whether balloon angioplasty preceded by ultrasound is any better for heart attack patients than is

that more research was needed to determine whether balloon angioplasty preceded by ultrasound is any better for heart attack patients than

考题讲解

题目分析:
(A)中的than右边是一个倒装的情况,比较对象是the balloon procedure的状态。(B)中比较对象是the balloon procedure本身,这不合逻辑。答案为(A)。


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