题目

Amy will have her       birthday next Friday. A. twelve      B. twelfth            C. the twelfth 答案：B 俗话说“下雪不冷，化雪冷”．这是因为                           (         ) A．下雪时雪的温度比较高         B．化雪时要吸收热量 C．化雪时要放出热量             D．雪容易传热