婴幼儿肌内注射的最佳部位是()。
A.臀大肌
B.臀中肌
C.三角肌
D.臀小肌
E.腹壁肌
参考答案:B, D
On yesterday interview, he didn’t make a(n)_________
at all; what’s the matter with him?
A.apology
B.appearance
C.difference
D.change
启闭器与给料机的区别是什么?