在S7-200PLC中，用一个定时器所能实现的最大计时时间是（）s。
A.32.767
B.327.67
C.3276.7
D.32767
参考答案：C
剧烈频繁呕吐可引起（）
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.混合性酸中毒
After she finished the letter, she went to bed. [ ]
A. to write
B. writing
C. written
D. wrote
