使用无菌持物镊的正确方法是() A．启用后有效时间为4小时 B．取镊时，不可触及容器

阅读短文填空。

     Look at this picture. It's our house. Some hills are near the house. There is (有) a big tree here

in front of the house. A bird (鸟) is in the tree. My brother's cat (猫) is under the tree. Its name is

Tom. There is a lake behind the house. A boat is on the lake now. In the boat there is a girl.  That's

my sister. Her name is Kate. Her dog is in the house.

1. A bird is in the _____ .

2. The _____ is under the tree.

3. A _____ is in the boat.

4. My sister is _____.

5. The cat's name is_____.

接触麻疹后超过多少天注射免疫血清球蛋白，就不能达到完全保护或减轻症状的目的（）

A.3天

B.5天

C.6天

D.8天

E.10天

2，4，6，36，8，64，10，( )

A．72

B．100

C．120

D．144

实现数据库操作的DAO技术,其模型采用的是层次结构,其中处于最顶层的对象是【 】。

在一般性项目的判断标准中，以产品与项目的质量、进度和预算达成度以及客户满意度来衡量判断项目是否成功。（）