小儿五软主要是指()
A.口软
B.骨骼软
C.足软
D.肌肉软
E.头项软
参考答案:A, C, D, E
---The famous singer will come to our school for a visit next week.
---Can you be more_____?
---On Sunday morning.
A.specific
B.appropriate
C.due
D.typical
制动方法可分为()。
A、手制动
B、脚制动
C、预见性制动
D、紧急制动
E、选择性制动