PREP-121 [sc1]

When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or an increase in volume if the gas is able to expand.

(A) When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or

(B) When the temperature of a gas is increased, it is accompanied either by an increase in pressure if it is enclosed in a container or

(C) When the temperature of a gas is increased, the increase is either accompanied by an increase in pressure if the gas is enclosed in a container or by

(D) Any increase in the temperature of a gas is either accompanied by an increase in pressure if it is enclosed in a container, or by

(E) Any increase in the temperature of a gas is accompanied either by an increase in pressure if the gas is enclosed in a container or by

答案是E没有问题.可是我想问C错在哪里呢?

谢谢~~

(C) When the temperature of a gas is increased, the increase is either accompanied by an increase in pressure if the gas is enclosed in a container or by

==》 either ... or 不平行。

晕,居然看漏了这个~~

谢谢啦~~