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题库 / GmatLaCourse-SC-34
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
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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)。
前一项提问提取主干错了。纠正一下：balloony preceded by ultrasound is better than balloon procedure by itself。所以选的Ｂ啊？
最合理的对比对象是the balloon procedure的状态，不是the balloon procedure本身，所以必须要补出助动词is
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