题干
看图读一读，把句子代码填入相应的括号里
A. —Is Ann reading a book? —No, she isn't. She's making a sandcastle.
B. Look at Tom. He is walking (走路）on the beach. He is very hot.
C. —Are the children collecting shells on the beach?—Yes, they are.
D. Look at John and Lily. They are flying kites in the park. They are happy.
⒈____⒉____⒊____⒋____
答案(点此获取答案解析）
C,B,A,D
2Ni(OH)2 。根据此反应判断，下列叙述中不正确的是（ ）