家长咨询婴儿开始会爬的年龄,护士的回答应为()。
A.6~7个月
B.8~9个月
C.1~1.5岁
D.1.5~2岁
E.10~11个月
参考答案:B
Some people maintain that watching violence on TV is one of the major causes of__________
behaviour and crime in society. [ ]
A. childish
B. artificial
C. aggressive
D. heroic
按变扭器的类型分类分为()和()两种。