利用建筑物主筋作为接地线时，与基础主筋焊接，根据主筋直径大小确定焊接根数，但不得少于（）根。
A、1
B、2
C、3
D、4
参考答案：B
吸入麻醉深度主要取决于（）
A.病人年龄
B.麻醉药效能
C.呼吸频率
D.脑内药物浓度
E.吸入药物浓度
—Who did it better, Bill or Henry?
—I think Bill did just _______ Henry.[ ]
A. as well as
B. as good as
C. as better as
D. more badly than
