液体火灾和可熔化的固体物质火灾中的汽油、沥青、石蜡火灾等属于（）
A.D类火灾
B.A类火灾
C.C类火灾
D.B类火灾
参考答案：D
New Rules and Behavior Standards(行为规范) for middle school students has come out.
As a student, you’re supposed to ________ according to it.
①tell the truth
②fight against your classmates often
③be open to new idea
④protect yourself
⑤cheat in the exam
A. ①②④ B. ①③⑤ C. ①③④
一台PC机调制解调器属于：
A．输入和输出设备 B．数据复用设备C．数据终端设备DTE D．数据通信设备DCE
