【单选题】关于葡萄糖的说法正确的是
E.
葡萄糖是一种多羟基酮,在水溶液中并具有旋光异构
【判断题】拉格朗日中值定理揭示的是:在闭区间上连续、开区间内可导的函数,其在闭区间上的平均变化率必等于其在开区间内某点处的瞬时变化率.
【单选题】Our city___a great deal. It doesn’t resemble the one of three years ago.
【单选题】With economy developing at great speed, our city has _____ quite a few changes in recent years.
【单选题】There great changes in our city in the past 10 years.