和对低年级学生威信的建立比较起来，对中、高年级学生建立威信更加容易和迅速。
参考答案：错
—Do you think I should get a good camera ?
—Yes , of course ._______, you also need a good map and comfortable shoes.
A．By the way
B．On the way
C．What’s more
D．In the end
肾清除率
