问题
选择题
已知Be在周期表中位于Al的左上方，则下列有关Be的说法中错误的是（ ）
A．单质Be与酸或碱反应都能放出氢气
B．Be(OH)2为两性氢氧化物
C．Be的氧化物的化学式为Be2O3
D．BeCl2晶体属于分子晶体
答案
答案：C
Be的氧化物的化学式为BeO，C错。故本题选C。
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已知Be在周期表中位于Al的左上方，则下列有关Be的说法中错误的是（ ）
A．单质Be与酸或碱反应都能放出氢气
B．Be(OH)2为两性氢氧化物
C．Be的氧化物的化学式为Be2O3
D．BeCl2晶体属于分子晶体
答案：C
Be的氧化物的化学式为BeO，C错。故本题选C。
Chairman Mao once said,“It is not hard to do one good deed. It is hard to do good deeds all your life.” Guo Mingyi, a 52-year-old worker in Anshan, Liaoning did just that. Over the past 20 years, Guo 1 60,000 mL of blood(血). That is the blood of 10 people put together. Once, 2 the cold winter of 2009,Guo got a call from the hospital. The doctors told him 3 a patient needed a blood donation. Guo didn’t have time to have lunch. He traveled in the snow to 4 the hospital. When he finished donating the blood, he was 5 tired that he fell asleep on the hospital bed. Guo and his family live a 6 life. They live in a house of only 40 square meters. 7 they don’t have a lot of money, Guo saves money to support poor children. In the past 16 years, he has given away over 100,000yuan to more than 180 poor students. When the parents met him, many cried,“He looks 8 than us.”they said. Guo has also offered help to thousands of workers, friends and strangers. His warm heart has moved many people. They 9 him a “Modern-Day Lei Feng”. Recently, Chinese leaders called on people to learn from Guo. They say young people especially should learn his selfless devotion (奉献). But Guo said he did these things in order not to get famous. “It’s just that some people need some help, and there should be someone standing out to give 10 a hand.” he said.
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