中国于哪一年首次参加了冬季奥运会。（）A.1976 B.1978 C.1980 D.

在热的稀硫酸中溶解了11.4 g FeSO₄固体，当加入50 mL 0.5 mol·L^－1 KNO₃溶液时，其中的Fe^2＋全部转化成Fe^3＋，KNO₃也完全反应并放出N_xO_y气体。

(1)推算出x＝       ；y＝       。

(2)配平该反应的方程式：

FeSO₄＋   KNO₃＋   H₂SO₄=   K₂SO₄＋   Fe₂(SO₄)₃＋    (N_xO_y)＋   H₂O(配平时x、y用具体数值表示，物质填在中)。

(3)反应中氧化产物是       。

(4)用双线桥法表示该反应中的电子转移方向和数目：                             。

阅读下列材料，从所给的六个选项 ( A、B、C、D、E和F ) 中，选出符合各小题要求的最佳选项。选项中有一项多余选项。

The following five young people are all searching for their universities. After the description of these people, there is some information about six universities A — F for you to choose the most suitable one for each of them. There is one extra paragraph about one university which you do not need to use.

小题1: Bobby is tired of working indoors and wouldn’t like to be too far away from his girlfriend who studies at Simmons. Also he considers gaining better chance for future career.

小题2: Maria wants to learn modern science and she prefers to stay neither by the ocean nor in the

northeast.

小题3: Andrew wishes to study business in a non-state-run university, which he thinks is of better

quality and if the employment status of its graduates is ideal, that’s better.

小题4:Lucy enjoys taking her further education in a women-only university with a variety major for her to choose.

小题5: Scott is in search for a university located in a nice place, with better living conditions. The most important is that he hopes to play the computer conveniently for fun.

A．SIMMONS The College of Arts and Sciences and Modern Studies. Simmons educates women to achieve their work and life goals. More than 40 majors. Lies in the heart of Boston, US. News &World Report ranks Simmons among the top state universities in the North and among the best values. 617-521-2051 www.simmons.edu.

B．PAUL SMITH’S COLLEGE The College of Nature. Experience a different kind of classroom: 15,300 acres of forests, lakes and streams, a hotel and a restaurant, 99% placement upon graduation. Two-and-four-year degree programs. PO Box 265Paul Smith, NY 12970800-421-2605

www.paulsmith.edu.

C．ST. MARY’S UNIVERSITY Located in the mid-west of the U.S. Personal attention. Powerful programs. Experience the technology of today at our co-educational university. One Camino Santa Utah 78228-8503 800-FOR-STMU www.stmarytx.edu.

D．NORTHERN UNIVERSITY A famous private university with 3,200 students in the Colleges of Arts & Sciences, Business and Engineering. Medicine and Law among the top ten by U.S. News & World Report Old Union 232 CA 94305-3005 650-723-2091 www.stanford.edu.E．UNIVERSITY OF PHOENIX   Adult education course. Earn an online degree with University of Phoenix today. 100% online, fast and convenient. Learn why most working professionals choose University of Phoenix Online.  www.Phoenixun.edu.

F．PETER’S COLLEGE  Experienced professors are available. Equipped with a lot of modern

facilities, two students a dormitory, two computers, power never fails, PO.356 Peter. 16753800-333-12-2135   www.peterun.edu.

将下列各种液体①苯 ②四氯化碳 ③碘化钾溶液 ④己烯，分别与溴水混合后充分振荡、静置，液体分为两层，原溴水层几乎是无色的是（   ）

A．只有②

B．只有②④

C．①②④

D．①②③④

有效控制肉毒梭菌滋生的方法（）

A.用低酸罐头加热杀菌方法杀灭肉毒梭菌（Ａ、Ｂ、Ｅ和Ｆ型）的芽胞

B.用酸化或发酵方法，使产品pH值降至4.6以下

C.采用腌制或干燥方法，使水活度降至0.93以下

D.以上方法都可行

下列句子中表述简洁不赘余的一句是( )。

A．会上，除非是终于付诸于表决，否则，争议之声不绝于耳，你要闭目养神，或思考前面的问题，并不可能。

B．近年来，日本人越来越喜欢和推崇该国作家良宽，且与年俱增，我认为这简直是现代的七大奇观之一。

C．从此我一改平素的习惯，天天在园丁和其他工人正酣睡的时候很早就起床。

D．开创华裔科学家问鼎诺贝尔奖先河的杨振宁教授认为朱棣文的“光学粘胶”实验意义非凡。