轮胎扁平率
参考答案：轮胎的高度和轮胎的宽度之比，用百分数表示就是轮胎的扁平率。
风冷冷凝器通常安装在室外（）。
A.靠近机组的背阳处
B.靠近机组的向阳处
C.远离机组的背阳处
D.远离机组的向阳处
He did not regret saying what he did but felt that he it differently.
A．could express
B．would express
C．could have expressed
D．must have expressed
