CM2006系统中贷后检查的流动资金贷款检查的频率为（）A、每月进行一次B、每季度进

短周期主族元素A、B、C、D、E在元素周期表中的位置如下图所示：请回答下列问题：

（1）B、C、D元素电负性的大小顺序为：______＞______＞______（填元素符号）．

（2）E的氢化物与其最高价氧化物的水化物的钾盐共热能发生反应，生成一种气体单质，反应的化学方程式为______．

（3）C有多种氧化物，其中甲的相对分子质量最小．在一定条件下，2L甲气体与0.5L氧气相混合，若该混合气体被足量的NaOH溶液完全吸收后没有气体残留，所生成的含氧酸盐的化学式______．

（4）在298K下，A、B的单质各1mol完全燃烧，分别放出热量a kJ和b kJ．又知一定条件下，A的单质能将B从它的最高价氧化物中置换出来，若此置换反应生成3molB的单质，则该反应在298K下的△H=______（注：题中所设单质均为最稳定单质）

（5）要证明与D同主族相邻元素F的非金属性与E的非金属性的强弱，正确、合理的实验操作及现象是______

（6）用A、B的单质作电极，C的最高价氧化物的水化物稀溶液作电解质溶液构成原电池，写出此原电池正极的电极反应式______．（假设C只被还原至+2价）

请仔细阅读这篇文章，然后做题。                                           

                                                                         The Earth

     Earth means many things to the people who live on it. A farmer thinks earthis soil for growing

vegetables and fruits. A person who makes roads thinks earth is mountains of hard rock. A sailor thinks

earth is water as far as the eyes can see.The earth is a big ball covered with water, rock, and soil. The

earth is a planet. There are nine planets around our sun.Animals and plants live almost everywhere on the

earth. They can live on the earth because it is not too far from the sun, or too close to the sun. Living things need the sun. The sun keeps them warm. Most living thing-plants, like vegetables, fruits, trees and grass,

and animals-also must have water to live. The earth has over seventy-five(75%)of water on it.

1. What does a farmer think earth is?

    _________________________________

2. What does a person who makes roads think earth is?

    _________________________________

3. What is earth to a sailor?

    _________________________________

4. Plants and animals need the sun to live,What else do they need?

    _________________________________

房屋建筑工程材料中熟石灰的化学分子式为（）。

A．CaCO₃

B．CaSO₄

C．CaO

D．Ca(OH)₂

下列针对人体力学采取的康复治疗方法是

A．言语治疗

B．认知治疗

C．运动治疗

D．物理因子治疗

E．作业治疗

沿固体介质表面的闪络电压比固体介质本身的击穿电压（）

A.高

B.低

C.相同

D.不确定