____  ____ brother ____ a Chinese lesson today?

____, he ____.

根据短文为文中的六个小伙伴找到他们各自的座位。

 Where do they sit?

    Six children go to the cinema(电影院) to see a new film(电影). The film is about animals. Their seats(座位) numbers are 5A, 5B, 5C, 5D, 5E and 5F. They sit in the same row(排). Sam sits in 5A. John sits in 5C. Helen sits between(在......中间) Sam and John. Sue sits beside John. Where is Mingming? He is between Sue and Mary.

 Where do they sit?

5A ____ 5B____ 5C____ 5D____  5E____  5F____

如图，抛物线y=x²+bx+c与x轴交于A、B两点，B点坐标为（3，0），与y轴交于点C（0，﹣3）

“稻花香里说丰年，听取蛙声一片”，发出鸣叫的蛙的性别及鸣叫的意义分别是 （   ）。

下列不属于生物学研究内容的是(    )