如图有关植物和人体生殖发育的叙述错误的是_刷题宝

题干

如图有关植物和人体生殖发育的叙述错误的是（　　）

A：开花和结果经历了传粉和受精两个过程

B：性器官的发育和成熟是青春期发育最突出的特征

C：胎儿与通过胎盘和脐带从母体获取营养物质

D：绿色开花植物的受精场所和人体的受精场所分别在甲图a和乙图c内

上一题下一题 0.0难度选择题更新时间:2016-11-09 06:46:18

答案(点此获取答案解析）

D

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设f（x）是定义在R上的奇函数，且对任意a、b∈R，当a+b≠0时，都有

\frac{f (a) + f (b)}{a + b} > 0

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完形填空

I have a good friend. His name is Tom. He is a nice boy, but he eats too1 and doesn't like sports. He has a big2 every morning. He has four eggs, 3 of bread and butter and 4 big glass of milk for it. 5 lunch, he eats two hamburgers, a lot of French fries of chicken. He 6 a lot of cola or soda, too. For dinner, he likes beef and salad. He7 eats beef, chicken, hamburgers, and eggs. He likes ice cream, cola and soda, 8. Too much food is not 9 for health. So Tom is very 10.

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下列叙述不正确的是（）

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天空中的那匹马忽然变得模糊了。

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中国同英国签订了《中英关于香港问题的联合声明》是在哪一年（）

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