保温材料的（），必须符合设计要求。
A.表观密度或干密度
B.导热系数
C.压缩强度或抗压强度
D.燃烧性能
参考答案：A, B, C, D
-Now that you like the computer so much, why not buy it?
-Well, I can't afford ______computer.[ ]
A. that expensive a
B. a that expensive
C. that an expensive
D. an expensive that
骨髓穿刺时，护士术前所做的哪项准备不妥
A．做普鲁卡因皮试B．嘱病人侧卧位，选髂前上棘为穿刺点C．术后平卧休息4hD．穿刺当日嘱病人不要沐浴E．观察穿刺部位有无出血
