问题
选择题
下列叙述正确的是 [ ]
A．CH4O和C2H6O一定互为同系物
B．16 g CH4与18 g NH4+所含质子数相等
C．SO2和H2S的反应可以证明+4价硫有还原性
D．标准状况下，质量相等、体积不相等的N2和C2H4的分子数相等
答案
答案：D
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下列叙述正确的是 [ ]
A．CH4O和C2H6O一定互为同系物
B．16 g CH4与18 g NH4+所含质子数相等
C．SO2和H2S的反应可以证明+4价硫有还原性
D．标准状况下，质量相等、体积不相等的N2和C2H4的分子数相等
答案：D
| 阅读理解。 |
| One day Mrs. Wilson went shopping with Tracy and Ben. They went to the supermarket in the new shopping center. "Why do you buy things here?" Tracy wanted to know. "Because they are cheaper here than at the corner store near our home," Mrs. Wilson said. "Help me check the prices, please." The Wilsons were not rich and Mrs. Wilson was always careful with her money. She looked carefully after the prices of things. She bought lots of things in the supermarket. When they got home, the children said, "We don't think you saved money by going to the supermarket." "Of course I did," Mrs. Wilson said. "Everything was cheaper there." "We know," the children said, "but we came home by taxi because we had too much to carry. The taxi fare was more than the money that you save!" Mrs. Wilson added everything up. Her children were right. |
| 1. The things at the corner store were _____ than those in the supermarket. |
| A. cheaper B. nicer C. more expensive |
| 2. Mrs. Wilson ______ in the end. |
| A. spent more money B. paid less money C. lost some money |
| 3. From the passage we know the children were ______. |
| A. happy B. clever C. tired |
| 4. Mrs. Wilson will ______. |
| A. never call a taxi B. go on buying things in the supermarket C. buy things near her home |
| 5. The best title for the passage is ______. |
| A. Cutting Price B. Corner Store C. Shopping |