A：蓝藻细胞中有的酶在核糖体上合成后，再由内质网和高尔基体加工
B：植物细胞进行有丝分裂后期细胞壁的形成与高尔基体有关
C：真核细胞中的DNA全部分布在细胞核中，所以细胞核是遗传控制中心
D：由rRNA和蛋白质组成的核糖体具有特定空间结构
减数分裂过程中，染色体数目减半发生在（ ）
B
I'm Tom and I like sports. Basketball is my favourite. I play it in. my school in the morning. My school is big and there is a playground and a sports hall in it. Every morning, many teachers and students play sports in the playground. I play there with my friends too. When the weather is bad we play in the sports hall. It's on the left of the playground. Now I'm in the sports hall but I don't play basketball. Some students from London are in our school and I'm their guide (导游).
My family also like sports too. My parents kick(踢)jianzi near our home every morning. My sister Mary plays table tennis with her classmates in their school. It is small but beautiful.
到2020年，我国要实现“农村基层组织建设进一步加强，村民自治制度更加完善，农民民主权利得到切实保障”的改革发展目标。下列标语中与材料内容最贴切的是（ ）
没有违法行为的未成年人才是未成年人保护法保护的对象。
After Steven sent some e-mails ,he______ surfing the Internet.
