当x=-2时,代数式3x+2x2-1与代数式x2-3x的差是( )。
-9
根据上下文或图片,补全对话。
1. A: _________________________________________________________
B: Yes, this is my bedroom.
2. A: _________________________________________________________
B: There is a bed, a closet, a mirror and an end table in Zip's room.
3. A: Where are the books?
B: _________________________________________________________
4. A: _________________________________________________________
B: Robot can use a computer.
5. A: _________________________________________________________
B: No, she isn't quiet, but she is active.
选用肾上腺皮质激素抗风湿治疗的指征是()
A.多发性关节炎
B.心脏炎
C.舞蹈病
D.皮下结节
E.环形红斑