通常我们所指的碱性耐火材料有（）。
A、半硅砖
B、铬砖、黏土砖、高铝砖
C、石英、硅砖
D、镁砖、铬镁砖、白云石砖、白云石、镁质耐火泥
参考答案：D
—I heard that more than 300 people died from the cold weather in England this winter.
—Yes, news came as shock to us.[ ]
A. a; a
B. the; /
C. /; a
D. the; a
MRI检查前的准备不包括
A．认真核对MRI检查申请单B．确认患者没有禁忌证C．有心理障碍者应用麻醉药物D．给患者讲述检查过程，消除恐惧心理E．婴幼儿、烦躁不安及幽闭恐惧症患者，应给予适量的镇静剂
