If you ever find yourself trapped in the wilderness without food, you'll have to figure out how to feed yourself. Many plants in the wild are edible, but many are also poisonous. So it is necessary to learn how to determine whether the plants you find can be eaten safely.
Avoid using this method without careful planning. Some plants can be deadly, and even if you follow these guidelines perfectly, there is always a chance that a plant will make you seriously ill. Prepare yourself for wilderness outings by learning about the local plants, and carry a guidebook to help you identify plants. Even if you are unprepared and cannot find food you know to be safe, remember that, depending on your activity level, the human body can go for days without food, and you’re better off being hungry than being poisoned.
Testing the plant in your mouth is dangerous, so go forward very slowly and carefully. First, hold a small portion of the prepared plant part against your lip for 3 minutes. Do not put the plant in your mouth. If you notice any burning, tingling (刺痛), or other reactions, discontinue testing. Second, place another small portion of the plant part on your tongue. Hold the plant on your tongue without chewing for 15 minutes. Discontinue testing if you notice any reaction. Third, chew the plant and hold it in your mouth for 15 minutes. Chew the plant well, and do not swallow. Discontinue testing if you notice any reaction. Fourth, swallow the small portion of the plant. Wait 8 hours. Do not eat or drink anything during this period except purified water. If you feel sick, immediately throw up what you eat and drink plenty of water. If activated charcoal (活性炭) is available, take that with the water.
39. What’s the meaning of the underlined world “edible” in paragraph 1?
A.Suitable for using as food. | B.Widely spread. |
C.Existing in large quantities. | D.Not widely known. |
40. What can we know from paragraph 2?
A.Planning is unnecessary when using the method. |
B.Not all plants in the wild can serve as food generally. |
C.Suffering hunger can be more dangerous than testing plants. |
D.Following the method perfectly can ensure safety. |
41. Which is the correct order of testing plants in the mouth?
① wait and see ② chew it in the mouth③ put it on the tongue④ put it against lips ⑤ swallow it
A.③④②①⑤ | B.④③②①⑤ | C.③④②⑤① | D.④③②⑤① |
42. Where might the passage come from?
A.A student’s diary. |
B.A science report. |
C.A guide book for camping. |
D.A doctor’ s notebook. |