问题
选择题
在探究骨的成分时，用火焰煅烧鸡骨及用盐酸浸泡鱼肋骨的目的分别是[ ]
A．除去骨中的有机物和除去骨中的无机物
B．除去骨中的无机物和除去骨中的有机物
C．增加骨中的有机物和增加骨中的无机物
D．增加骨中的无机物和增加骨中的有机物
答案
答案：A
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在探究骨的成分时，用火焰煅烧鸡骨及用盐酸浸泡鱼肋骨的目的分别是[ ]
A．除去骨中的有机物和除去骨中的无机物
B．除去骨中的无机物和除去骨中的有机物
C．增加骨中的有机物和增加骨中的无机物
D．增加骨中的无机物和增加骨中的有机物
答案：A
| 阅读理解。 | ||||
Here are four kinds of trip for vacation:
| ||||
| 1. What number may you call if you and your friends want to enjoy the sunshine at the seaside? | ||||
[ ] | ||||
| A. 67538293. B. 63986432. C. 64639818. D. 63875629. | ||||
| 2. Sam wants to stay in Hunter Valley with his wife, his five-year-old daughter and his seven-year-old son. How much will it cost? | ||||
[ ] | ||||
| A. $25. B. $50. C. $100. D. $150. | ||||
| 3. David loves sports. He will take his holiday from May 7 to May 15.What activity will he probably join in? | ||||
[ ] | ||||
| A. Hiking in the mountains. B. Fishing in the country. C. Watching plants at night. D. Swimming in the sea. | ||||
| 4. Lucy wants to know something about the life of plants at night. Which trip will she take? | ||||
[ ] | ||||
| A. Trip 1. B. Trip 2. C. Trip 3. D. Trip 4. | ||||
| 5. Which of the following is NOT mentioned (提到) according to four ads? | ||||
[ ] | ||||
| A. The sun hat. B. The warm clothes. C. The umbrella. D. The camera. |