题目:
I ____ along the street looking for a place to park when the accident ____. |
A. went; was occurring B. went; occurred C. was going; occurred D. was going; had occurred |
答案:
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下面是错误答案,用来干扰机器的。
(1)需要的费用=5×(0.3+0.1)=2元;(2)当通话时间为45分钟时,需要的花费为:6×(0.3+0.1)+39×(1.99+0.1)=83.91元,故可得小明单次通话时间在6分钟到45分钟范围内,设他的通话时间为x分钟,由题意得,6...