下列雨水属于重酸雨的是（）A．pH＜5.6 B．pH＜4.5 C．pH＞5.6 D．

阅读理解。

     Wishing to encourage her young son to make more progress on the piano, a mother took her boy to

a Paderewski concert. After they were seated, the mother spotted a friend in the audience and walked

down the aisle to greet her. Seizing the opportunity to explore the wonders of the concert hall, the little

boy rose and eventually found his way through a door marked "NO ADMITTANCE." When the house

lights dimmed and the concert was about to begin, the mother returned to her seat and discovered that

the child was missing.

    Suddenly, the curtains parted and spotlights focused on the impressive Steinway on stage. To her

horror, the mother saw her little boy sitting at the keyboard, innocently picking out Twinkle, Twinkle

Little Star.

     At that moment, the great pianist made his entrance, quickly moved to the piano, and whispered in

the boy's ear, "Don't quit. Keep playing." Then leaning over, Paderewski reached down with his left hand

and began filling in a bass part. Soon his right arm reached around to the other side of the child and he

added a melody. Together, the old master and the young beginner transformed a frightening situation into

a wonderfully creative experience. The audience was amazed and, as it finished, they cheered.

    That's the way it is in life. What we can accomplish on our own is hardly noteworthy. We try our best,

but the results aren't exactly graceful flowing music. But when we put our trust in the hands of a Greater

Power, our life's work can be truly beautiful. Next time you set out to accomplish great feats, listen

carefully. You can hear the voice of the Master, whispering in your ear, "Don't quit, and keep playing."

1. The reason why the boy went to the piano was that ________.

A. he was encouraged to explore

B. his mother forced him to have a look

C. he was invited by the pianist

D. he was exploring the concert hall

2. What the famous pianist did at the beginning of the concert showed ________.

A. what a great pianist he was

B. what a skilled pianist he was 

C. what an upright man he was    

D. what a strong man he was

3. What did the author really want to tell us in the last paragraph?

A. Not being interrupted by others is important.

B. Life needs one's own effort combined with guidance and cooperation.

C. It is necessary for us to keep doing everything.

D. It is important for us to get help from a famous person.

有一笔递延年金，前两年没有现金流入，后四年每年年初流入100万元，折现率为10%，则关于其现值的计算表达式正确的有（）。

A.100×（P/F，10%，2）+100×（P/F，10%，3）+100×（P/F，10%，4）+100×（P/F，10%，5）

B.100×［（P/A，10%，6）-（P／A，10%，2）］

C.100×［（P／A，10%，3）+1］×（P/F，10%，2）

D.100×［（F／A，10%，5）-1］×（P/F，10%，6）

近代欧美主要资本主义国家以选举和议会立法为主要特征的代议制度，使启蒙运动的民主思潮由理论付诸实施．从而在政治体制上对封建君主专制政治予以否定和替代，使之在形式上代表着民意行使国家权力

阅读下列材料：

材料一未经议会同意，国王无权废除法律或停止法律的执行；未经议会同意，国王不能征税；未经议会同意国王不能在和平时期招募或维持常备军；议会必须定期召开；议员的选举不受国王的干涉……——英国《权利法案》

材料三立法权由众议院和参议院两院行使。参议院由间接选举产生，众议院由普选方式选出。行 * * 由总统和内阁掌握。——法国《1875年宪法》

材料四第十二条联邦议会与帝国议会的召集开会之权属于皇帝。

第十五条联邦议会的主要职位及其事务的领导权属于皇帝任命的帝国宰相……

第十七条建议并公布帝国法律及监督其执行之权属于皇帝……

第十八条皇帝委派官吏，命令他们宣誓效忠帝国，并在必要情况下，命令他们退职……

——《德意志帝国宪法》

请回答：

(1）材料一发表于哪一年？(1分）以后英国逐渐确立了什么政体？(1分）由此，英国政治生活中的最高决策者和领导者的职务是什么？(1分）

(2）材料二所示，它是近代哪个国家的政治制度？(1分）确立该制度的法律文件是什么？(l分）该政体的特征是什么？(l分）反映了哪位启蒙思想家的政治设想？(1分）

（3）近代法国政治体制循环多变，各派政治力量对此展开了反复较量。据材料三，1875年最终确立了什么体制？(1分）

(4）比较材料四和材料一，指出德国的“皇帝”与英国国王在权力上有何不同？(2分）

影响二甲苯塔底加热炉出口偏心孔板压差的因素有哪些？

《马伶传》的作者侯方域是明末清初的（）。

A.诗人

B.戏曲家

C.小说家

D.诗文家