A．气体急剧膨胀对外做功，温度升高
B．气体做等温膨胀
C．气体膨胀，温度下降
D．气体等压膨胀，内能增加、
答案：C
儿童口腔行为管理的方法不包括（）
A.正强化
B.告知-演示-操作（TSD.技术
C.惩罚
D.分散注意力
E.保护性固定
—Don't you usually take the bus to school?
—________. I often walk to school. [ ]
A. Yes, I do
B. No, I do
C. Yes, I don't
D. No, I don't
