______can be seen from the comparison of these figures, the principle involves the active participation of the patient in the mo

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问题 ______can be seen from the comparison of these figures, the principle involves the active participation of the patient in the modification of his condition.

选项 A、As
B、What
C、That
D、It

答案A

解析 定语从句。as引导非限制性定语从句可以放在主句之前,指代主句的内容,而which只能放在主句之后,故答案为A。
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