以下关于确定施工顺序应遵循的基本原则说法错误的是（）。 A.先地下，后地上 B.先围

下列说法正确的是(　 　)

A．BaSO₄在水中很难导电，所以BaSO₄是非电解质

B．氨气溶于水得到的氨水能导电，所以氨水是电解质

C．固态的离子化合物不导电，熔融态的离子化合物能导电

D．强电解质溶液的导电能力一定比弱电解质溶液的导电能力强

College students have a little ways to pay their college fees. Many students have their parents to pay the fees. Some students may apply to a bank loan and others will try to find part-time jobs in and out of the campus. Apart from this, many good student can win a scholarship. By this way they can pay at least part of the fees. As to me, I will let my parents pay half of their fees because they are rich enough. Beside my study, I will take up a part-time job by teach some high school students math, physics, chemistry and English, as I’m very good at these important subjects. Of course I will also work very hard at my lessons in order to I can easily win a scholarship.

羚角钩藤汤的臣药是（）

A.桑叶

B.川贝母

C.鲜生地

D.淡竹茹

E.茯神木

算法分析的目的是（）。

A．找出数据结构的合理性

B．找出算法中输入和输出之间的关系

C．分析算法的易懂性和可靠性

D．分析算法的效率以求改进

（）是将管道安装并固定在建（构）筑物JJ的构件．并对管道有承重、导向和固定作用。

A.配件

B.管架

C.弯管

D.法兰