已知A、B、C、D、E是短周期中的5种非金属元素，它们的原子序数依_爱下问搜题

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问题填空题

已知A、B、C、D、E是短周期中的5种非金属元素，它们的原子序数依次增大。A元素原子形成的离子核外电子数为零，C、D在元素周期表中处于相邻的位置，B原子的最外层电子数是内层电子数的2倍。E元素与D元素同主族；E的单质为黄色晶体，易溶于二硫化碳。

（1）请写出下列元素的元素符号

A： C： E：（各1分）

（2）画出E的阴离子结构示意图： (1分)

（3）A的单质和C的单质在一定条件下生成化合物X，用电子式表示X的形成过程（2分）；向X的水溶液中滴入酚酞溶液，会观察到（1分）

（4）将9克B的单质在足量的D的单质中燃烧，所得气体通入1L 1mol·L^-1

NaOH溶液中，完全吸收后，溶液中大量存在的溶质是，

且物质的量为（各2分）

答案

（1）A：H C：N E：S （各1分）

（2）（1分）

（3）（2分）；溶液变红色（1分）

（4）NaHCO₃ Na₂CO₃（2分）n _NaHCO3=0.5mol n _Na2CO3=0.25mol（2分）

完形填空

Directions： Complete the passage below with the correct forms of the given words and phrases in the column (ONE is extra).

motivation Positive remain accomplish guarantee

Appreciate go after however Apart from hardship

When we talk about happiness， we’ll naturally relate it to 　1　 or pleasant emotions. Many people consider happiness to be their ultimate (最终的) goal in life that they will spend their whole lives 　2　. Then how can we achieve happiness？

One effective way is to try to 　3　 in good spirits anytime and anywhere. Contrary to the belief that happiness comes hand in hand with much wealth， money is never enough to 　4　 happiness. What we simply need to do is 　5　 the precious things we have in life， such as good health， family and friends. The secret to obtaining happiness is perfectly explained in the proverb “Happy is he who is content (知足的)” .

　6　 staying optimistic， one can also gain happiness by 　7　 something meaningful. For instance， doing charity work and volunteering to help those in need can give you a sense of happiness as you realize you are doing your part for a better world.

Never quit seeking after happiness because of the fear inside or the 　8　 outside. Everyone has the right to pursue happiness and will surely find it with enough courage and 　9　.

填空题

【】权限允许修改数据，但不允许删除数据。