债券和其他类型固定收益证券组合的业绩通常是通过将其在某一时间区间内的利息支付与某个代

下列各组离子，在强碱性溶液中可以大量共存的是（　　）

A．Na⁺、AlO₂^-、Cl^-、S^2-

B．Na⁺、K⁺、NH₄⁺、Ba²⁺

C．Al³⁺、K⁺、Cl^-、CO₃^2-

D．SO₃^2-、NO₃^-、SO₄^2-、HCO₃^-

信息匹配(共5小题；每小题2分，满分10分)

阅读下列应用文及相关信息，并按照要求匹配信息。

Ever wonder what President  George “Dubya” Bush will be doing once he leaves the White House? Well．we wondered too and voted for him to run a hot dog stand．in the city that never sleeps New York!

Life’s tough in the Stone Age．Fortunately our man Sam has got your brain to help him out! He’s got to find food，make weapons，survive tigers，and keep his girlfriend Lucy happy! So let’s get prehistoric and help Sam in this crazy adventure．

Hit the snow slopes with this snowboarding game．Perform special skills on your snowboard to collect points．Pump air into your stride by timing your jumps carefully while negotiating 3 killer kickers．Whatever you do — Have fun!

Add logic，fun and load of color and what do you get? The crazy cube!  And we promise you, it’s the craziest cube you’ll come across this side of the universe．Rack your brains crazy in this totally addicting puzzle game and beat the colored cube!

Put your hard hat on…because we’re going under construction! This addictive puzzle game will have you constructing for hours! Build beautiful towers using colorful building blocks．

Fight to conquer the universe in this strategic space simulation game．Play as a space commander and protect your imperial star base from enemies．Become the most powerful air force and fulfill your one and only mission：complete space dominance!

请阅读以下的人员资料，然后匹配人员与相关游戏。

小题1:Sammy is a girl with a logical mind．She would like to play the kind of games that can not only practice her intelligence but Call challenge her memory as well．

小题2:Amy has always been interested in politics and loves to play jokes on politicians．As a result，any game that concerns government officials would interest her．

小题3:Jack is a student who is keen on architecture．He has problem in concentrating himself on a piece of work．He hopes to find a game that can suit his interest and help him focus his mind on it．

小题4:William is a sports fan who would like to take up extreme sports．But he isn’t allowed to try such kind of dangerous sport，SO he could only find some relevant games to play．

小题5:Teddy is a film lover．After seeing the film The Star Wars，he imagined that he could one day be a commander，leading his soldiers to protect his planet from being invaded．

晓丽今年7岁，她因患有先天性心脏病在出生后不久就被父母遗弃了，后来被当地的福利院收留。在福利院中有很多与晓丽有类似遭遇的小朋友，他们都生活得很好，唯独晓丽闷闷不乐，还非常任性和固执，只要是她认定的东西就必须得到，否则就会大哭大闹。平时也不喜欢与其他小朋友一起玩耍，总是默默地坐在角落中看着天空发呆，还很怕见到陌生人，每当有陌生人出现在福利院中，晓丽总是躲得远远的，如果有人想接近她，她就会大哭。
问题

儿童社会工作具有什么特点？

对HIV传播途径的控制主要手段有哪些？

适合数控铣床加工的工艺是提高经济效果的重要因素，（）的工件是数控铣床最适合加工的对象。

A.单件

B.小批量

C.一定的批量

D.重复投产

E.表面形状复杂

F.加工过程中需要经常测量