正常小儿前囟闭合最晚的年龄是
A.10个月
B.1岁半
C.1岁8个月
D.2岁半
E.3岁
参考答案:B
We go to school ______ Monday ______ Friday. [ ]
A. to from
B. on from
C. from on
D. from to
稳定转向特性分为()、()、()。