题目

Here are the responses from parents to the posts(帖子)about toys. ●Michele Manhire My son Aaron is 8. It’s been 8 birthdays and 9 Christmases of “What can we get, Aaron?” without proper toys along the way. He is just simply particular about toys. I can honestly tell you, I am printing this list, and heading to a couple of stores (some online) that I can get some of these items! Maybe this won’t be such a depressing Christmas. ●Vera Do you have any yam balls (纱球)I bought a giant one for my classroom but ended up keeping it for my own kids. They’re strong enough to t如图是描述某种生命活动的模型，下列叙述正确的是（ ）A. 若A代表兔同化的能量，a代表兔摄入的食物，则b、c可分别代表被下一营养级摄入和排便的能量流动途径B. 若A代表叶绿体基质，a代表光，则b、c可分别代表该场所产生的[H]和ATPC. 若A为调节中枢，a为渗透压升高，则b、c可分别代表抗利尿激素的减少和产生渴觉D. 若A代表人体B细胞，a为抗原刺激，则b、c可分别代表浆细胞以及记忆细胞的形成