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问题 选择题

有反应mA（g）+nB（g）⇌wC（g），测得在同一时间内A每分钟减少0.15mol•L-1，B每分钟减少0.05mol•L-1，C每分钟增加0.1mol•L-1，则下列叙述不正确的是（　　）

A．m：n：w=3：1：2

B．体积和温度不变时，若在前10s内A减少了x mol，则在前20s内减少小于2x mol

C．体积和温度不变时，随反应进行压强逐渐下降，一段时间后压强保持恒定不变

D．单位时间内反应物浓度的减少等于生成物浓度的增加

答案

A．反应速率之比等于化学计量数之比，则m：n：w=0.15：0.05：0.1=3：1：2，故A正确；

B．前10s内A浓度大，反应速率快，而后10s内A的浓度变小，反应速率减慢，所以前10s内A减少了x mol，则在前20s内减少小于2x mol，故B正确；

C．该反应中由A选项可知，m+n＞W，随反应的进行，压强减小，直到达化学平衡，则一段时间后压强保持恒定不变，故C正确；

D．因反应物与生成物的化学计量数不等，则单位时间内反应物浓度的减少不等于生成物浓度的增加，故D错误；

故选D．

完形填空
Children and young people tend to have certain role models – people they want to be like when they grow   1 . Though at first children would have wished to copy their mother, father or a (n)  2  relative, gradually these role models are thought of as famous people or popular   3 . People have different opinions about  whether  popular stars or other famous people are good role models for children. Charming models, such as Katie Price, are often   4  and thought highly of by young girls. This is the biggest worry of parents and teachers. They wish to   5  their children to have the concept that success is achieved through hard work and   6  rather than an attractive looking.
Most people tend to grow up to be those 7  are close to home — their parents or family friends. Some decide to be like their favorite teacher. A child who loves to   8  may want to grow to be the next Picasso or Van Gogh; Someone who loves to   9  might imagine themselves as a famous writer; if a child enjoys dancing, he or she   10  well admire a famous dancer, but this is not the case. A lot of dance students wish to be like their  11  teacher.
Therefore, the job of a teacher is   12  just providing knowledge of a given subject. They should be able to   13  their students’ trust and  14  them well. Helping youngsters to learn from models, to learn how to accept   15  with grace(优雅) and losing with respect, is central to any parent’s or teacher’s job. Manners are very important and a dance teacher can make use of  his or her position and influence(影响) to introduce  good behaviors to youngsters.
小题1:
A．youngerB．strongerC．olderD．taller
小题2:
A．generousB．favoriteC．ordinaryD．humorous
小题3:
A．fansB．starsC．singersD．dancers
小题4:
A．awardedB．admiredC．admittedD．afforded
小题5:
A．encourageB．receiveC．holdD．ignore
小题6:
A．luckB．imaginationC．effortD．effect
小题7:
A．whatB．whichC．itD．who
小题8:
A．read and writeB．sing and danceC．listen and speakD．draw and paint
小题9:
A．writeB．readC．travelD．think
小题10:
A．shouldB．mayC．mustD．need
小题11:
A．danceB．musicC．artD．piano
小题12:
A．better thanB．less thanC．more thanD．rather than
小题13:
A．receiveB．loseC．gainD．accept
小题14:
A．communicate withB．keep up withC．come up withD．catch up with
小题15:
A．challengingB．fallingC．failingD．winning
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单项选择题

当事人对欠付工程价款利息计付标准没有约定的，按照（）。

A.中国人民银行发布的同期同类贷款利率计息

B.中国人民银行发布的利率计息

C.中国人民银行同期贷款利率计息

D.中国人民银行发布贷款利率计息
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