健康检查是指对健康儿童定期或不定期地进行（）。

任务型完形填空

用横线上所给单词的适当形式填空，每个单词限用一次，使短文通顺正确连贯，将答案填写在题后的横线上。

history, choose, common, buy, make, enjoy, way, another, while, serve

American summers are filled with outdoor picnics, baseball games and swimming pools. Summer in America is a time 小题1:________ the outdoors, no matter how hot it might be. Let’s take a look at some of the popular drinks.

Lemonade is 小题2:________ of all American summer drinks. It 小题3:________ by mixing lemon juice, water and sugar. It is usually served very cold, with ice.

Ice tea is 小题4:________ popular summer drink in America. Ice tea is usually 小题5:________ in a tall glass of ice. Many Americans 小题6:________ to add sugar to sweeten the drink. This drink is often drunk in the afternoon 小题7:________ relaxing in the shade. Ice tea is now also sold by the bottle , at almost any store in America.

The Slurpee, a famous American drink in recent years, is a great 小题8:________to cool off in the summer heat. It is a mix of ice, sugar and fruit juices. However, the drink is mostly made of ice. They can小题9:________ at most small convenient stores. Slurpees are popular with young Americans.

Milkshakes have a long 小题10:________ in America . It is made of a mix of ice cream , milk and flavoring.

卤素化学丰富多彩，能形成卤化物、卤素互化物、多卤化物等多种类型的化合物。

（1）基态溴原子的简化电子排布式为________。

（2）卤素互化物如BrI、ICl等与卤素单质结构相似、性质相近。Cl₂、BrI、ICl沸点由高到低的顺序为_________。

（3）多卤化物RbICl₂加热时会分解为晶格能相对较大的卤化物A和卤素互化物或卤素单质，A的化学式为____________。

（4）I³⁺（可看成II²⁺）属于多卤素阳离子，根据VSEPR模型推测I³⁺的空间构型为______。

（5）气态氟化氢中存在二聚分子(HF)₂，这是由于______________。

（6）①HClO₄、②HIO₄、③H₅IO₆[可写成(HO)₅IO]的酸性由强到弱的顺序为________（填序号）。

无理数的发现导致了希腊人对数作为宇宙本源的信念的动摇，所以后来它的数学就以几何为中心了。

（）是发动机混合气中供给的空气不足，燃烧不完全的产物，是汽车废气排放中浓度最大的有害成分。

根据《建设工程安全生产管理条例》规定，作业人员应当遵守安全施工的（）。

A．强制性标准 

B．规章制度 

C．文明施工操作规程 

D．群防群治制度 

E．操作规程