图甲、乙、丙分别表示某种二倍体生物的三个正在进行分裂的细胞．请据图回答下列问题：

（1）该生物体细胞中染色体数目是____ ．

（2）图中属于减数分裂的细胞是____ 和____ ．

（3）含有同源染色体的细胞是____ 和____ ．

（4）丙细胞中含有____ 条染色单体．

有关太阳系中行星的叙述，不正确的是（    ）

根据短文填表。

    Mrs. Wilson is not tall with curly hair. She comes from Australia. She is our math teacher. But I don't like maths. It's too difficult and boring. Mrs. Wilson is 25 years old. She is very shy and kind of serious. She never plays games with us. She often sees the films on weekends. And she enjoy reading very much. She has lots of books in her bedroom.

Which do you prefer to use to keep in touch with your friends, QQ______ WeChat？