药物过敏通常最有效的治疗是（）
A.皮质激素
B.H受体阻断剂
C.立即停止相应药物使用
D.肾上腺素
E.人静脉注射免疫球蛋白
参考答案：C
33．_________ in some rural schools that the teacher is even unable to walk through the rows of desks．
A．The classroom is as crowded
B．So crowded is the classroom
C．As crowded the classroom is
D．The classroom is such crowded
一个完整的微型计算机系统应包括硬件系统和软件系统两部分。
