弹性材料密封和管式密封对原油储贮还具有一定的()作用。
A.刮腊
B.脱硫
C.降低含水量
参考答案:A
甲数比乙数多25%,乙数比丙数少25%,那么甲数小于丙数.______.(判断对错)
(68) are those programs that help find the information you are trying to locate on the WWW.
A.Windows
B.Search Engines
C.Web Sites
D.Web Pages