一道PREP的语法

when the temperature of 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.

这是偶选的

when the temperature of gas is incresed, the increase is either accompanied by an increase in pressure if the gas is enclosed in a container or by

这是正确的

any increase in the temperature of a gas is is acccompanied either by an increase in pressure if the gas is encloseed in a container or by

偶觉得这里加了个any, 是不是有改变题意的嫌疑阿