水泵运行过程中常出现哪些异常声音?
参考答案:
1、气蚀异音
2、松动异音
3、小流量异音
4、滚动轴承异音
下列哪项不属于健康人乳喂养儿的粪便特点()。
A.多为均匀糊状
B.呈黄色或金黄色
C.偶有细小乳凝块
D.量多,较臭
E.较稀薄,不臭,有酸味
Some people maintain that watching violence on TV is one of the major causes of ______ behavior
and crime in society.
[ ]
A. childish
B. artificial
C. aggressive
D. heroic