问题
名词解释
保虫宿主(第二中间宿主)
答案
参考答案：
某些惯常寄生于某种宿主的寄生虫，有时也可寄生于其它一些宿主，但寄生不普遍多量，无明显危害，通常把这种不惯常被寄生的宿主称之为保虫宿主。
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保虫宿主(第二中间宿主)
参考答案：
某些惯常寄生于某种宿主的寄生虫，有时也可寄生于其它一些宿主，但寄生不普遍多量，无明显危害，通常把这种不惯常被寄生的宿主称之为保虫宿主。
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| A man found the cocoon (茧) of a moth (蛾). He took it home so that he could 1 the moth come out of the cocoon. On that day a small 2 appeared. He sat and watched the moth for several hours as the moth struggled to 3 the body through that little hole. Soon it seemed to stop making any progress. It appeared as if it had 4 as far as it could and it could go no further. It just seemed to be stuck. So the man, out of his kindness, decided to help the moth. He took a pair of scissors and cut off the _5 _ bit of the cocoon. The 6 then came out easily. But it had a swollen body and small, shriven (无用的) wings. The man continued to watch the moth because he expected that, at any moment, the wings would enlarge and 7 to be able to support the 8 , which would get smaller in time. Neither happened! In fact, the little moth spent the rest of its life 9 around with a swollen body and shriven wings. It was 10 able to fly. What the man in his kindness 11 was that the small cocoon and the 12_of the moth to get through the 13 opening was a way to push fluid (液体) 14 the body of moth 15 its wings so that it would be ready to fly 16 it got out of the cocoon. Freedom and 17 would come only after the struggle. By taking the struggle away, he also took away the moth's health. Sometimes struggles are exactly what we need in our lives. If we were to 18 our lives without any difficulties, we would become disabled. We would not be as 19 as what we could have been. Give every opportunity a chance. Leave no room for 20 . | ||||
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