问题
选择题
H2、CO、C分别与黑色的氧化铜反应，下列叙述中错误的是（ ）
A．反应都需要加热
B．都有红色铜生成
C．都属于置换反应
D．H2、CO、C都具有还原性
答案
答案：C
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H2、CO、C分别与黑色的氧化铜反应，下列叙述中错误的是（ ）
A．反应都需要加热
B．都有红色铜生成
C．都属于置换反应
D．H2、CO、C都具有还原性
答案：C
完形填空 The Smiths are taking a vacation next week. At first, they thought about 1 to Beijing. Because they went there three times, so there’s nothing 2 for them. This time, they want to go 3 . 4 are they going then? “I want to go to Jiuzhaigou,” said Tom. “But it’s quite 5 from here and we have only two 6 ,” Mary disagreed. “I think we should go somewhere near here.” And 7 they decided 8 to Qingdao. Qingdao is famous 9 its beautiful beaches. They are leaving 10 Friday evening and staying there 11 two days. On the first day, they are going to the 12 to see the dolphins(海豚). On the second day, they are going to the beach and 13 there. They are taking 14 on the beautiful beach. They are sure that they will 15 themselves in Qingdao.
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