已知反应：mX(g) + nY(g)  qZ(g) △H<0,m+n>q,在恒容的密闭容器中反应达到平衡时，下列说法正确的是（  ）      

如图，在平面直角坐标系xOy中，A、B为x轴上两点，C、D为y轴上的两点，经过点A、C、B的抛物线的一部分c₁与经过点A、D、B的抛物线的一部分c₂组合成一条封闭曲线，我们把这条封闭曲线成为“蛋线”．已知点C的坐标为（0，﹣ $\frac{3}{2}$  ），点M是抛物线C₂：y=mx²﹣2mx﹣3m（m＜0）的顶点．

    Today is Friday. Peter has six classes today. He goes to school at 7:30 a.m. At 8:00 a.m., he begins his first class. The first class is English. At 9:00 a.m., he has math. Peter likes math because it’s interesting. At 10:00 a.m. she has a biology class. Peter thinks it's very boring. Then at 11:00 a.m., he has a history class. That's his favorite subject. He can learn a lot about the past from history.
    Peter has lunch at school at about 12:00. Then he has a short break. At 1:30 p.m., he has a music class. At 2:30 p.m., he has a P.E. class. Peter likes this afternoon, because music and P.E. are easy and interesting. School is over at 4:00 p.m. Peter is happy because he can go home and have a good time on Saturday and Sunday.
阅读短文内容，选择正确答案。

把陈述句换成把字句

①姐姐送我一件最有意义的礼物。 ②乌云遮住了太阳。

下列排列顺序正确的是
①热稳定性：H₂O＞HF＞H₂S
②原子半径：Na＞Mg＞O
③酸性：H₃PO₄＞H₂SO₄＞HClO₄
④结合质子能力：OH^-＞CH₃COO^-＞Cl^-