毒性越高防治效果（）。A.不一定越好 B.一定越好 C.一定越差 D.不变

根据句意，用所给动词的适当形式填空。

小题1:When I saw the parade in Disneyland, I couldn’t stop ___________ (take) photos .

小题2:It takes about three hours ___________ ( fly )to Hong Kong .

小题3:Students should read more books ___________ ( improve ) their writing .

小题4:Sadly, the little dog ___________ (die) for some time .

小题5:You must ___________ (return) these books to the library as soon as possible.

Do you like Home with Kids (《家有儿女》)? It is very popular (受欢迎的) now. many children like it. There is a sister and two brothers in their family.

Father doesn’t do housework often. He is always happy. Mother loves her children, but she gets angry easily. Sister, Xiao Xue, is a good student. Big brother, Liu Xing, can always make other happy. He likes ball games. Little brother, Xiao Yu, is helpful. He likes playing computer games.

根据短文内容，判断正（T）误（F）

小题1:There are five people in the family.

小题2:Father often does housework.

小题3:Xiao  Xue isn’t a good student.

小题4:Liu Xing likes playing computer games.

小题5:Xiao Yu has a brother and a sister.

海关封志是海关监督措施的体现，任何人都不得擅自开启或损毁，这是一项禁止性规范。 ( )

判断并改正：电子商务是指通过利用现代信息技术、网络技术和多媒体交互技术等，使企业在创造和提供顾客价值上，获得在传统营销中所不具有的一些独特优势而开展的电子化营销。

原油换热系统监控参数是原油流量、温度和换热器两端的（）。

A.流速差

B.液位差

C.压差

D.温差