问题
选择题
除去铁粉中混有的少量铝粉，可选用的试剂是[ ]
A．盐酸
B．NaOH溶液
C．氨水
D．稀硝酸
答案
答案：B
搜题请搜索小程序“爱下问搜题”
除去铁粉中混有的少量铝粉，可选用的试剂是[ ]
A．盐酸
B．NaOH溶液
C．氨水
D．稀硝酸
答案：B
James’s New Bicycle James shook his money box again. Nothing! He carefully __26__ the coins that lay on the bed. $24.52 was all that he had. The bicycle he wanted was at least $90! __27__ on earth was he going to get the __28__ of the money? He knew that his friends all had bicycles. It was _29__ to hang around with people when you were the only one without wheels. He thought about what he could do. There was no __30__ asking his parents, for he knew they had no money to __31__. There was only one way to get money, and that was to __32__ it. He would have to find a job. __33_ who would hire him and what could he do? He decided to ask Mr. Clay for advice, who usually had _34__ on most things. “Well, you can start right here,” said Mr. Clay. “My windows need cleaning and my car needs washing.” That was the __35__ of James’s odd-job(零工) business. For three months he worked every day after finishing his homework. He was amazed by the __36__ of jobs that people found for him to do. He took dogs and babies for walks, cleared out cupboards, and mended books. He lost count of the __37__ of cars he washed and windows he cleaned, but the __38__ increased and he knew that he would soon have __39_ for the bicycle he longed for. The day __40__ came when James counted his money and found $94.32. He __41__ no time and went down to the shop to pick up the bicycle he wanted. He rode __42__ home, looking forward to showing his new bicycle to his friends. It had been hard __43__ for the money, but James knew that he valued his bicycle far more __44__ he had bought it with his own money. He had __45__what he thought was impossible, and that was worth even more than the bicycle.
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