问题
选择题
Excuse me, where is the nearest hotel? Go _____ the road, then turn left _____ the first street. [ ]
A. across; on
B. along; at
C. along; across
D. across; at
答案
答案：B
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Excuse me, where is the nearest hotel? Go _____ the road, then turn left _____ the first street. [ ]
A. across; on
B. along; at
C. along; across
D. across; at
答案：B
，则f(x)有间断点x=______，是______型，间断点x=______，是______型．