特种设备安全监督管理部门实施重点安全监察的场所是（）.A.工厂 B.学校 C.停车场

由FIDIC专业委员会编制的《土木工程施工合同》，总结了世界各国土木工程建设管理数十年的经验，以其( )著称。

A．严谨性

B．合理性

C．科学性

D．常规性

E．公正性

类风湿关节炎患者，可在其关节腔积液中发现的结晶是（）。

A.磷灰石结晶

B.尿酸盐结晶

C.草酸钙结晶

D.胆固醇结晶

E.类固醇结晶

用所给动词的适当形式填空。

1. I ___________ (be) learning English for five years since I was ten years old.

2. If I don't study hard, I ___________ (not pass) the final exam.

3. I ___________ (study) for my exam when my friend called to invite me to the movies.

4. We ___________ (have) so many exams this year that I am sick of them.

5. It ___________ (be) a nice day yesterday, wasn't it?

6. It's now four o'clock, so we ___________ (be) skating for about two hours.

7. I ___________ (go) to school early today.

8. My friend ___________ (collect) shells as a hobby.

9. We are going to the beach tomorrow, ___________ (be) we?

10. My brother ___________ (be) playing the piano since he was ten.

我国年降水量分布的总趋势是从        向         递减。

下列选项中（）不属于网络安全的问题。

A.拒绝服务

B.黑客恶意访问

C.计算机病毒

D.散布谣言