A：该物质的分子式为SN
B：该物质的分子中既有极性键又有非极性键
C：该物质具有很高的熔、沸点
D：该物质与化合物S2N2互为同素异形体
节俭是传统美德，经济学家凯恩斯提出了节俭悖论，人为节俭对个人、家庭来说是美德，对国家社会则意味着支出减少，导致有效需求不足，阻碍经济发展，造成失业增加，收入减少。这启示我们( )
①个人应该节俭，社会应该扩大消费 ②政府应当刺激消费
③既要勤俭节约，又要适度消费 ④应该重视消费的作用，积极引导消费
healthy，eating，always，friend，be，in，play，sports，
but，day，volleyball，fat
I have two pen ____. They ____ Zhang Ming and Zhao Ping. Zhang Ming is ____ Shanghai. Zhao Ping is in Beijing. We like ____. We are all in sports clubs(俱乐部) at school. I ____ play basketball. Zhang Ming likes ____. And Zhao Ping often ____ ping-pong. ____ we like different(不同的) food. I like vegetables. Zhang Ming likes ____ hamburgers and Zhao Ping eats lots of fruit every ____.
F的化学式是____ ；
