甲、乙两数的和是40，甲：乙=3：2，甲数是______．

Was it through Mary _____ was working at a high school ____ you got to know Tom?

A．who; who

B．that; which

C．who; that

D．who; which

给下列复合句中的定语从句填上正确的介词和关系代词。

1. We saw several natives advancing towards our party, and one of them came up to us               we gave some bells and glasses.

2.1 was given three books on cooking, the first              I really enjoyed.

3. The students visited the farm                  the farmers raise varieties of beef cattle.

4. The gym                     the gymnast is doing gymnastics is a newly-built one.

目前最有影响的网络管理协议有两个，一个是公共管理信息服务和公共管理信息协议CMIS／CMIP，另一个是_____。

儿童审美心理的综合性特征表现在以下三个方面（）。

A.直观性抽象、纯真性

B.直观性、创造性、纯真性

C.创造性、直观性、抽象性

D.直观性、抽象性、情感性

各式太极拳中的“掌”型都是不一样的。