幽门梗阻病人可发生（）。
A.呼吸性酸中毒
B.呼吸性碱中毒
C.代谢性酸中毒
D.代谢性碱中毒
E.呼吸性酸中毒合并代谢性酸中毒
参考答案：D
_______ time this afternoon, I would teach you how to use the computer. [ ]
A. Had I
B. Were I to have
C. If I had had
D. If I have
常见的血循环毒类毒蛇有（）。
A.五步蛇
B.海蛇
C.银环蛇
D.烙铁头
E.金环蛇
