A-A+
According to the passage it is difficult to i
问题详情
According to the passage, it is difficult to interpret the results of certain treatments for SARS because______.
A．patients were in different countries .
B．patients were given medicines in widely different settings
C．patients were at different stages of the illness
D．these conditions had no standardized measurements or controlled situations
参考答案
正确答案：D
解析：事实细节题。参见第三段最后一句“Those conditions--generally without standardized measurements or controlled situations--have made it hard to interpret results(这些情况——通常缺乏标准化的检测或可控制的状况——使得结果难以确定) ”，D) 与此完全吻合。
