The driver_____ _____(减速) When he crossed the busy road.

扶梯在正常工作状态下做匀速运动，某地铁站的自动扶梯突发故障，载有100余名乘客的扶梯匀速上行中突然反向，变成匀速下行，致使部分乘客摔倒受伤。下列分析正确的是（   ）

A．匀速上行过程中乘客处于超重状态

B．匀速下行过程中乘客处于失重状态

C．扶梯反向过程中乘客对扶梯的摩擦力方向向右

D．扶梯反向过程中乘客对扶梯的摩擦力先减小后增大

  Premier（总理）Wen Jiabao was in Hunan to help direct disaster relief（减灾）work in the central Chinese province. Premier Wen Jiabao arrived in the city of Changsha, the capital of Hunan province, on Tuesday morning.

  He flew out of Beijing on Monday night, but had to land at Tianhe Airport in neighboring Hubei Province because of the bad weather in Hunan, before completing his journey by train.

  He said the crisis(危机)there means the government can’t wait any longer.

  Wen Jiabao said, “Our task in Hunan province is to restore（恢复）the electricity supply and rail operation between Changsha and Shaoguan．If we finish that successfully, it will built up the confidence of the whole nation in combating (与战斗) disaster.”

  The Premier also warned that the situation is still continuing, and said all efforts should be made to prepare for the worst. He expressed his confidence in the province’s capability to deal with the disaster in a short time．

Wen later went to, see the families of the three workers in the Hunan Electric Power Company, who lost their lives in rescue work. He said the people and the country won’t forget them for their work．

  The Premier also visited the Changsha Railway Station and spoke with passengers stranded（使搁浅）there．

  Wen Jiabao said, “I’m so sorry that you are all stuck（滞壁, 困难）here. We are fighting against time to restore, the power grids（电网）. Once the repairs are finished, railway services will resume（恢复）. And you will be going home for the Spring Festival soon! I wish you a happy Spring Festival. Thank you!”

  In the afternoon, Wen Jiabao travelled along the Beijing – Zhuhai highway（京珠高速）and stopped in the hardest—hit area of Majiahe in Xiangtan city. Wen said electricity company employees have done well in dealing with the disaster there. They not only protected the power grids in Hunan, but also assisted（协助）their counterparts in neighboring Guizhou province. Wen said he appreciates their contribution.

  Also on the Beijing – Zhuhai highway Wen visited the Changtan Highway workers who have done well in dealing with the disaster there. They not only protected the power grids in Hunan, but also assisted their counterparts in neighboring Guizhou province. Wen visited the Changtan Highway workers who have been engaged(参加)in relief work for 6 days. The premier expressed his appreciation to them as well.

  1．The passage is a（an）            .

    A．story                   B．report                  C．guide                     D．instruction

  2．Why did Premier Wen Jiabao come to Hunan

    A．He came to help direct disaster relief（减灾）work. 

    B．he wasn’t busy.

    C．it snowed heavily in the central Chinese province

    D．A, B and C

  3．According to the passage, how many workers in the Hunan Electric Power Company did rescue work?

    A．Three                  B．One                     C．Two                      D．Four

  4．Did Premier Wen Jiabao promise that passengers stranded in the Changsha Railway Station could go home three days later? 

    A．Yes，he did．                                         B．No he didn’t．

    C．Yes he does．                                            D．We don’t know．

  5．Which statement is not right?

    A．Premier Wen Jiabao said the people and the country will remember the workers in the Hunan Electric Power Company died in rescue work forever.

    B．The crisis there means the government can’t wait any longer.

    C．Premier Wen Jiabao flew to Changsha on Tuesday morning.

    D．The Changtan Highway workers worked there without rest for 6 days.

一定量的盐酸跟过量的铁粉反应时，为了减缓反应速度，且不影响生成氢气的总量，可向盐酸中加入适量的①NaOH固体 ②H₂O  ③NH₄Cl固体  ④CH₃COONa固体 ⑤NaNO₃溶液 ⑥KCl溶液，其中正确的组合是（   ）

A．②④⑥

B．①②③

C．②③⑤

D．②④⑤