问题
判断题
受精时决定了性别，在胚胎两性的生殖系统才开始分化。
答案
参考答案：对
搜题请搜索小程序“爱下问搜题”
受精时决定了性别，在胚胎两性的生殖系统才开始分化。
参考答案：对
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| Look at this photo. The boy in a blue jacket is my good friend. 1 name is David. He’s fourteen years old. He likes playing 2 very much and he has a great sports collection. He has ten 3 , twenty basketballs and thirty baseballs. He also 4 sports on TV. His brother John 5 sports, too. But he has a small sports 6 . He has five basketballs, six baseballs 7 only one soccer ball. They 8 a good computer, but they 9 like computer games. They always say it is 10 and it’s not good for their study. They are really sports fans but not computer fans. Don’t you think so?
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