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问题 推断题

下图是初中化学中常见物质间的转化关系(部分反应物、生成物未列出)，其中A是一种建筑材料的主要成分，C是气体，H是可用于农药的氢氧化铜。试回答下列有关问题：

(1)写出有关物质的化学式： A_____________；C_____________。

(2)使接近饱和的F溶液成为饱和溶液的措施是____________________________；由F与X反应后得到G溶液的实验操作名称是_________________。

(3)写出G + E → H的化学方程式：__________________________________。

(4)上述转化关系图中涉及到的物质，按单质、氧化物、酸、碱、盐进行分类，一定没有的物质类别是

_________________。

答案

(1) CaCO3；CO2

(2) 加入Ca(OH)2 (或CaO)（或升高温度或蒸发水）；过滤

(3)CuCl2+2NaOH=Cu(OH)2↓+2NaCl 或 CuCl2+2KOH=Cu(OH)2↓+2KCl 等

(4)单质

选择题

They stay _____home _____Monday _____Wednesday. [ ]

A. in, from, to                      

B. at, from, to  

C. in, in, or                        

D. at, on, to
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填空题

How many of us would temp for three years while we waited for the perfect job Not many of us, perhaps. But Wentworth Miller, the "Prison Break" star, said he chose to wait even longer time (1) he found the right job.
"Actually I think it might have been three or four years until I was lucky enough to get guest (2) on TV shows," said Miller, 34, who rose to international stardom (3) to "Prison Break" in 2006. That kind of patience and p will was portrayed in "Prison Break". Miller (4) engineering wizard Michael Scofield, who tries everything to break out of a Chicago (5) with his brother. Miller said he was fond of his character, (6) he said "exists in shades of grey".
Miller comes from a (7) of teachers. He said he didn’t seem fated for a career in the arts, (8) his passion for acting. After (9) from Princeton with an English degree, he moved (10) his parents’ request to Los Angeles to look for a stable life. He started (11) in a little company that made television movies. This (12) simply faxing, filing, walking the boss’ dog and going to the store for the boss’ lunch. Every weekend during the summer, Miller (13) go to the office (14) he didn’t have air-conditioning. "I would hang (15) in the conference room and set up camp and rob the company kitchen," recalled Miller.
(16) , Miller realized he still had questions about his choice. He decided to quit. But the boss said he was making a mistake and offered him a well-paid assistant position. "I eventually (17) that if I did the corporate job, it would be great if I was successful, but I would always wonder about the (18) . If I did the acting and was successful, I would never wonder (19) that job," he explained. He quit and temped (20) many people in the entertainment industry.
Now, he’s a hot star and has people coming up to him at film festivals saying, "Weren’t you the one who (21) to stand by the copy machine "
"That was tough, but I’m glad I have that perspective. Because now I’m at a point (22) big shots laugh at all my jokes and I think, You know, I got coffee for people like you for six years’. So I know what’s (23) , because I’ve seen the other side." But what if, when he was offered the corporate job, there had been more money "It was never about the (24) There’s a kind of excitement that comes along with acting. I can’t find it anywhere else. Even if I had to go back to temping, even if this is not the beginning of an amazing career, I would not (25) making that jum
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