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President Hu Jintao flew to the earthquake-hit region in Yushu, Qinghai on April 18, 2010. At a field hospital on the grounds of a sports stadium, Hu sat on the bed of Drolma, a middle school student, and held her in his arm as she wept(哭泣). "Rest assured(放心的), you will have a full recovery(康复). Be strong. You will have a bright future," he told her. |
![]() The 2010 World Expo, Shanghai China |
The 2010 World Expo Shanghai China Duration(举办时间): May 1 to October 31, 2010 Expected visitors: 70 million Theme(主题) : "Better City, Better Life." The theme represents the common wish of the people all over the world for a better living in future urban(城市的) environments. |
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The 19th FIFA World Cup(世界杯足球赛) Duration: June 11 to July 12, 2010 Host(主办) nation: South Africa Number of teams: Thirty-two Number of matches: Sixty-four It is the first time that the tournament(锦标赛) has been hosted by a nation in the Confederation(联盟) of African Football. |
President Hu Jintao flew to Yushu, Qinghai _________, 2010.
A. | on May 1 | B. | on June 11 | C. | on April 18 | D. | on July 12 |
President Hu Jintao comforted(安慰) _________ at a field hospital.
A. | a middle school student | B. | a soldier |
C. | a farmer of Yushu | D. | a doctor |
The 2010 World Expo in Shanghai will end on _________.
A. | September 30 | B. | October 31 | C. | November 30 | D. | December 31 |
The theme of Expo 2010 is "_________"
A. | Better City, Bright future. | B. | Better City, Good Environment. |
C. | Better City, Better Life. | D. | Better City, Best Investment(投资). |
There will be _________ teams taking part in the 19th FIFA World Cup.
A. | 10 | B. | 12 | C. | 13 | D. | 32 |
砷化镓(GaAs)是一种“LED”绿色节能光源材料,镓元素的相关信息如图。下列有关镓的说法错误的是
A.原子的核电荷数是31 | B.元素符号是Ga |
C.相对原子质量为69.72g | D.属于金属元素 |
由以下粒子结构示意图得出的结论中错误的是
A.上述粒子属于五种不同元素的粒子 |
B.①②为非金属元素的原子,④⑤为金属元素的原子 |
C.③为相对稳定结构,一般不容易参加化学反应 |
D.上述粒子在发生化学反应时,其质子数、电子数均发生改变 |
某物质经测定只含有一种元素,则关于该物质的说法正确的是
A.一定是纯净物 | B.一定是混合物 | C.一定不是化合物 | D.一定是一种单质 |
下列净化水的操作中,可以降低水的硬度的是
A.过滤 | B.蒸馏 | C.吸附沉淀 | D.静置沉淀 |
下列实验操作正确的是