幼儿每天需要的睡眠时间是
A．8～10h
B．12～13h
C．14～15h
D．15～16h
E．16～17h
参考答案：B
—Dad, the bread is not enough. I am still hungry. ______ I have something more?
—But there's nothing in the fridge now. [ ]
A. Must
B. Need
C. Will
D. Can
类风湿关节炎的诊断标准是什么？
