大全201

periodic

201. Cardiopulmonary resuscitation should begin between one to four minutes after a cardiac arrest in order to be a success.

(A) Cardiopulmonary resuscitation should begin between one to four minutes after a cardiac arrest in order to be a success.

(B) Between one and four minutes after a cardiac arrest, cardiopulmonary resuscitation should begin to be successful.

(C) Successful cardiopulmonary resuscitation should be begun from one to four minutes after a cardiac arrest occurs.

(D) If it is to be successful, a cardiac arrest should be treated with cardiopulmonary resuscitation one to four minutes afterward.（E）

(E) To be successful, cardiopulmonary resuscitation should begin within one to four minutes after a cardiac arrest. 我想问的是，within one to four minutes 和 from one to four minues 在意思上是相同的吗？ 为什么它不说within four minutes? 谢谢

thinkers

楼上解释的很清楚了，呵呵

jhiiool

within one to four minutes 指在1到4分钟之间不确定的一个时间点。

from one to four minues 指1到4分钟之间这三分钟这个时间段。

within four minutes?这个，连1都没了，意思明显不同吧。