A：电解时阴极发生还原反应
B：电解时以精铜作阳极
C：粗铜连接电源正极，其电极反应是Cu =Cu2+ + 2e—
D：电解后，电解槽底部会形成含少量Ag、Pt等金属的阳极泥
把正方形ABCD沿对角线AC折起,当以A，B，C，D四点为顶点的三棱锥体积最大时，直线BD和平面ABC所成的角的大小为（ ）
关于中国古代出现的资本主义萌芽说法错误的是
用低倍镜观察洋葱根尖细胞的有丝分裂图像，应先找到根尖的
A：This is my family photo.
B：____
A：Nine
A：He is my father.
A：He is a doctor.
A：Yes, she is.
B：What does she do?
A：She is a teacher.
A：She works in Yucai Middle School.
A. Where does she work?
B. How many people are there in your faimly?
C. Is this your mother?
D. Who is this man?
E. What's your father?
《海国图志》的作者是____，他提出了“____”的主张。
