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似蛔线虫卵（）,带绦虫卵（）,日本血吸虫卵（）

似蛔线虫卵（）,带绦虫卵（）,日本血吸虫卵（）
题目：似蛔线虫卵（）,带绦虫卵（）,日本血吸虫卵（） A．椭圆形，个体大，壳薄而均匀，有盖，内含卵细胞及卵黄细胞 B．灯泡形，个体很小，有盖，内含毛蚴 C．卵圆形，无盖，一侧有小棘，内含毛蚴 D．椭圆形，壳厚而均匀，壳外有凹凸不平蛋白质膜，内含卵细胞 E．圆球形，外有较厚具放射状条纹的胚膜，内含六钩蚴 喵查答案：D,E,C ……继续阅读 »

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Once it was possible to define male and female roles easily by the division of labor. Men worked outside the home and earned the income to support their families, while women cooked the meals and took care of the home and the children. These roles were firmly fixed for most people, and there was not much opportunity for women to exchange their roles. But by the middle of this century, men’s and women’s roles were becoming less firmly fixed.

Once it was possible to define male and female roles easily by the division of labor. Men worked outside the home and earned the income to support their families, while women cooked the meals and took care of the home and the children. These roles were firmly fixed for most people, and there was not much opportunity for women to exchange their roles. But by the middle of this century, men’s and women’s roles were becoming less firmly fixed.
题目：Once it was possible to define male and female roles easily by the division of labor. Men worked outside the home and earned the income to support their families, while women co……继续阅读 »