若点P(m,2)与Q(3,n)关于原点对称,则m=______;n=______.
∵点P(m,2)与Q(3,n)关于原点对称,
∴m=-3,n=-2.
故答案为:-3,-2.
按要求写句子。
1. He likes reading comic books. (变为否定句)
_________________________________________________________________
2. My mother is an accountant. (对画线部分提问)
3. I'm going to the park. (对画线部分提问)
4. She is going to play the violin. (对画线部分提问)
5. She is an actress. (变为一般疑问句)
超声判断宫内节育器位置正常的标准是:
①节育器在肌层内;
②节育器在宫腔内;
③节育器在宫颈内;
④宫腔内节育器上缘与宫底间距离为17~20mm
A.①②③
B.①③
C.②④
D.④
E.①②③④