关节盘的双板区是()。
A.构成关节盘的后附着
B.构成关节盘的前附着
C.位于关节盘的前带和中带之间
D.位于关节盘的中带和后带之间
E.以上均不是
参考答案:A
— Why are you still busy with your homework? You _____ it hours ago.
— Sorry, dad. I haven't been feeling well since early evening. [ ]
A. should have finished
B. should not finish
C. should finish
D. must have finished
正常3个月婴儿应会的动作是
A.会翻身B.能独坐C.会爬行D.会独立行走E.会上下台阶