以下符合硅砖性质的描述是（）
A.属于酸性耐火材料
B.荷重软化温度较低，约为1300℃
C.导热性能好
D.抗温度急变性能好
参考答案：A, C
He didn't buy the book because he was interested in poetry.
A．He didn't buy the book because he was not interested in poetry.
B．He bought the book, but it is not because he was interested in poetry.
C．He bought the book because he was interested in poetry.
D．He bought the book because he was not interested in poetry.
下列不属于光盘的是
A．PROM
B．CD-ROM
C．CD-R
D．CD-RW
