题干

下列有关实验的叙述,正确的是(    )

A:甲实验中,被燃烧的食物所含的能量等于试管内水吸收的能量与灰烬中剩余能量之和

B:乙实验中,该动作有必要重复多次

C:丙实验中,选择尾鳍作为显微镜下观察的部位,主要是因为尾鳍中有丰富的动脉和静脉

D:丁实验中,用皮筋扎紧 a 处,用手指沿 ab 方向将血液推向 b 处,血管 ab 段不会扁平

上一题 下一题 0.0难度 选择题 更新时间:2016-06-23 07:18:19

答案(点此获取答案解析)

B

同类题3

Chris Jones 刚刚结束了一次不寻常的印度之旅,记者就此对他进行了采访。以下是采访的部分内容:

Reporter: ____

Chris: Well, it all started two years ago when I was planning a trip to India, I visited  a photographic(摄影的) exhibition of elephants and I realized that the only way to travel around India was on an elephant.

Reporter: ____

Chris: I flew to New Delhi and started looking for an elephant. I needed an elephant trained to carry people. I asked an expert for help. He taught me how to ride an elephant. He also helped me find an elephant.

Reporter: ____

Chris: Not too long, I bought a female(母的) elephant called Tara for about USD 6, 000.

Reporter: ____

Chris: Tara and I set off from New Delhi a week later. We were heading to Sonepur in northern India. And what a ride! Elephants can travel at about 6 miles an hour and Sonepur was more than 1, 200 km away. It took us 64 days to complete the journey.

Reporter: ____

Chris: Yes, a few. But nothing serious. On the third day, Tara hurt her foot. But that got better quickly. Also, there was a lot of heavy rain during the first week and we got very wet!

请根据Chris Jones 的回答,从A、B、C、D、E、F六个选项中选择恰当的问题填入相应的五个空格中。

A. How long did it take to find a suitable elephant?

B. What gave you the idea to travel around India on an elephant?

C. Did you have any problems on your journey?

D. Can you tell me the journey?

E. What did you do next?

F. An unusual journey.