下列实验事实所引出的相应结论正确的是
| 选项 | 实验事实 | 结论 |
| A | Na2S2O3溶液与稀H2SO4溶液混合时，其他条件相同，Na2S2O3溶液浓度越大，析出硫沉淀所需时间越短 | 当其他条件不变时，增大反应物浓度化学反应速率加快 |
| B | 在化学反应前后，催化剂的质量和化学性质都没有发生改变 | 催化剂一定不参加化学反应 |
| C | 将NH4Cl晶体与Ba(OH)2.8H2O晶体混合后研磨，烧杯壁温度降低 | 该反应为吸热反应 |
| D | 在容积可变的密闭容器中发生反应 H2（g）+ I2（g） 把容积缩小一倍 | 正反应速率加快，逆反应速率不变 |
要到微信小程序或APP查看答案哦。
实在点不开答案，可以分享到微信，
在微信里面查看答案。
APP具体操作流程为：
|
下列关于生物体内水的叙述，不正确的是[ ]
A．结合水是细胞的重要组成成分
B．血细胞中的水大部分是自由水
C．细胞内结合水与自由水的比值与新陈代谢强度无关
D．自由水可参与细胞内物质的运输与化学反应
Time magazine named Russian President Vladimir Putin its "Person of the Year" for 2007 on Wednesday, saying he had returned his country from chaos（混乱）to "the table of world power" though at a cost of democratic principles.
He doesn't care about civil liberties; he doesn't care about free speech; he cares about stability. But Putin, 55, is enormously popular in Russia, presiding over a resurgent economy based on income from oil and natural gas. On the other hand, stability is what Russia needed and that's why Russians adore（爱戴）him.
Time magazine said on its Web site that Putin, the son of a factory worker had led Russia with persistence, a sharp vision and a sense that he showed the spirit of "Mother Russia".
The selection came days after Putin announced a plan to hold onto power after his term ends next year. Putin said on Monday that if his close ally(盟友），Dmitry Medvedev, won the presidency, he would serve as Medvedev’s prime minister. "Putin has put his country back on the map. And he intends to redraw it himself,"Time said. "He will continue to lead his country as its prime minister and attempt to transform it into a new kind of nation, beholden to neither East nor West."
Time said the person of the year distinction, which it has awarded since 1927, is not an endorsement（支持）or a popularity prize but a recognition of the individuals and forces that shape the world. "At significant cost of, the principles and ideas that free nations prize, (Putin) has performed an extraordinary feat of leadership in placing stability on a nation that has rarely known it and brought Russia back to the table of world power. For that reason, Vladimir Putin is Time's 2007 Person of the Year," the magazine said.
Time had earlier selected four other Kremlin leaders for the distinction: Stalin, who was chosen twice, Nikita Khrushchev, Yuri Andropov and Mikhail Gorbachev.
小题1:What does the underlined word "feat" in Para 5 probably mean?
A．Style.
B．Level.
C．Standard.
D．Achievement.小题2:What's the major reason why Putin becomes popular in Russia?
A．His successful economy policy
B．His outstanding ability of politics
C．His great contributions to Russian economy and social stability.
D．His wisdom of changing the world.小题3:What may be the best title of the passage?
A．Putin－Time magazine’s person of the year 2007
B．Putin－a world power leader
C．Putin－a beloved Russian president
D．Putin－an honorable Russian president小题4:What can we inter from the passage?
A．Russia, including the former Soviet Union, has been one of the major countries named person of the Year so far.
B．Only an individual can be named Person of the Year nowadays.
C．Putin played an important role in Russian social and economic troubles.
D．Medvedev will certainly be elected Russian President on March 3.
在潮湿地区接临时照明，其电压不得超过（）伏。
下列账户余额，可能在资产负债表中用负数填列的是（）
A、“待摊费用”账户
B、“应交税金”账户
C、“累计折旧”账户
D、“无形资产”账户