把一个比的前项扩大到原来的4倍，后项缩小到原来的14，比值会扩大到原来的16倍；
故判断为：×．
—Someone has tidied the sitting room!
—Jim __ it this morning; he couldn't bear the mess any more．
A．has done
B．would do
C．had done
D．did
A．I有=3/2A，Im=3A
B．I有=3A，I有=3A
C．I有= A，I有 A
D．I有3A，Im=6A
/2
