下列关于异尖线虫(病)的说法正确的是()
A．该线虫的感染性虫卵是其感染人体的阶段
B．其成虫寄生于海产哺乳类动物的胃中，第三期幼虫则寄生于多种海鱼体内
C．人体因误食其第三期幼虫而感染，但幼虫不能在人体内发育成熟
D．不吃生鱼或将鱼肉经-20℃冷冻24小时再食用是预防本病的关键
E．异尖线虫病为人兽共患寄生虫病
参考答案：B, C, D, E
| 阅读短文还原句子。 | |
First, there is the school or work friend. This is the person who helps you get through the school or work day. But you never really go out with them outside these places. However, they are important in your life as you will spend a lot of time with them. 2 _____.You can't really discuss anything important with them. But if you are feeling sad, they're great to go out with because they can cheer you up and make you for- get all your troubles. The next kind of friend is really unusual and having one makes you very lucky. They are really kind so they pay for you every time you go out. They usually have many of the things you can't afford to buy. 3_____. Finally, there is the best friend. This is the person who knows you inside out. The person you would have no problem spending the whole day with. Friends are the most important thing in your life. 4 _____. | |