储存甲类和乙A类油品如原油、汽油、溶剂油等的地上立式油罐,应选用()。
A、浮顶罐或者内浮顶罐
B、固定顶罐
C、球罐
D、卧罐
参考答案:A
二尖瓣关闭不全的全收缩期杂音是()
A.递增型杂音
B.递减型杂音
C.递增递减型杂音
D.连续型杂音
E.-贯型杂音
The dictionary doesn't belong to your brother ____, but it belongs to me.
A.and, me
B.or, yours
C.or , mine
D.and, yours