下列性状中，属于相对性状的是（    ） 

标准状况下有以下四种气体：①6.72L CH₄②3.01×10²³ HCl分子③13.6g H₂S ④0.2mol NH₃。下列对四种气体的关系从小到大表示不正确的是（   ）

有一个边长为3cm，密度为2×10³m³的一个立方体橡皮泥块。(g取10N/kg）

— How can I stay in shape?

— A well-balanced diet together with regular exercise ______ you'll make it.

    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。