问题
单项选择题
除去混在NaaCO3粉末中的少量NaHCO3最合理的方法是（）。
A.加热
B.加NaOH溶液
C.加盐酸
D.加CaCl2溶液
答案
参考答案：A
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除去混在NaaCO3粉末中的少量NaHCO3最合理的方法是（）。
A.加热
B.加NaOH溶液
C.加盐酸
D.加CaCl2溶液
参考答案：A
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| A Chinese student went to England to study by plane. His name was Sun. It is spelt SUN just 1 the word "sun", the sun in the sky, is spelt. England is a country with 2 weather. It is often cloudy and rainy, so the people there don't get 3 sunlight (阳光) in the year. When 4 Chinese student arrived at 5 Airport, a tall English policeman opened his 6 to check the visa (签证). The policeman was 7 to find the Chinese name "Sun" in the passport. He thought it was pronounced just 8 the English word "sun", so he said to the student, "I see your name is Sun. You are 9 here." The Chinese student felt 10 It was then that the policeman began to laugh. He said, "You don't know what you have done, Mr. Sun? You bring sunlight to England! So we don't want you to go away." | |||
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