以下有关钙拮抗药作用的错误叙述是（） A.减少心肌细胞内Ca2+ B.抑制血小板聚集

A man sat at a metro station in Washington DC and started to play the violin; it was a cold January morning. He played six Bach pieces for about 45 minutes. During that time, since it was rush hour, 1,100 people went through the station, most of them on their way to work.

Three minutes went by, and a middle aged man noticed there was musician playing. He slowed his pace, and stopped for a few seconds, and then hurried up to meet his schedule.

A minute later, the violinist received his first dollar tip: a woman threw the money in the money box without stopping, and continued to walk.

A few minutes later, someone leaned against the wall to listen to him, but the man looked at his watch and started to walk again. Clearly he was late for work.

The one who paid the most attention was a 3-year-old boy. His mother tagged him along, hurried, but the kid stopped to look at the violinist. Finally, the mother pushed hard, and the child continued to walk, turning his head all the time. This action was repeated by several other children. All the parents, without exception, forced them to move on.

In the 45 minutes the musician played, only 6 people stopped and stayed for a while. About 20 gave him money, but continued to walk their normal pace. He collected $32. When he finished playing and silence took over, no one noticed it. No one applauded, nor was there any recognition.

No one knew this, but the violinist was Joshua Bell, one of the most talented musicians in the world. He had just played one of the most beautiful pieces ever written, on a violin worth $3.5 million dollars. 

Two days before his playing in the subway, Joshua Bell sold out at a theater in Boston where the seats averaged $100.

This is a real story. Joshua Bell’s playing in the metro station was organized by the Washington Post as part of a social experiment.

The outlines were: in a common environment at an inappropriate hour: Do we enjoy beauty? Do we stop to appreciate it? Do we recognize the talent in an unexpected situation?

One of the possible conclusions from this experience could be: If we do not have a moment to stop and listen to one of the best musicians in the world playing the best music ever written, how many other things are we missing?”

小题1:Few people stopped to listen to Joshua Bell playing because______.

A．people were in a hurry

B．they were not interested in music

C．it was too cold in the subway

D．the performance was not good enough小题2:When children stopped to look at the violinist, their parents ______.

A．would give him some money

B．would stop to enjoy the music

C．would applaud for the performance

D．would urge them to continue walking小题3:Joshua Bell played in the metro station in order to ______.

A．make more money

B．practice his skills in playing music

C．made an advertisement for his concert

D．find out people’s reaction under such a circumstance小题4:The purpose of the passage is to _____.

A．set us to think about our life

B．show us how to play music

C．tell us the importance of music

D．report a subway performance

下列哪一阶段不属于受精卵在母犬体内进行的胚胎早期发育过程（）。

A、卵裂

B、迁移

C、附植

D、分化

甲公司为一般纳税人，适用增值税税率为17%，适用城市维护建设税税率为7%，适用教育费附加费率为3%。2010年1月公司有关资料如下：
(1)6日，盘亏原材料一批，实际成本为12000元。
(2)9日，向乙公司销售产品，开出的增值税发票注明：不含税价款1700000元，增值税额289000元。收取货款1989000元款存入银行。
(3)20日，办理银行承兑汇票用于购买企业生产所需的不含税价款为800000元，增值税额为136000元的K材料，并支付办理银行承兑汇票的手续费468元。
(4)计算并以银行存款交纳当月应交增值税。
(5)计提当月应交城市维护建设税10852.8元，教育费附加4651.2元。
[要求]编制甲公司以上业务的会计分录。

下列说法中正确的是 [ ]

A．质量大的物体，其德布罗意波长小

B．速度大的物体，其德布罗意波长小

C．动量大的物体，其德布罗意波长小

D．动能大的物体，其德布罗意波长小

软什是程序、数据和______的集合。