问题
选择题
等比数列{an}的各项均为正数，且a5a6+a4a7=18，则log3a1+log3a2+…log3a10=[ ]
A．12
B．10
C．8
D．2+log35
答案
答案：B
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等比数列{an}的各项均为正数，且a5a6+a4a7=18，则log3a1+log3a2+…log3a10=[ ]
A．12
B．10
C．8
D．2+log35
答案：B
It was a cold winter’s night when I stopped for gas on my way home from work. I was tired and had a slight 36 . I worked in a 37 doctor’s office and this was one of those days when the unexpected happened, making the schedule run 38 than usual. It seemed I was going to be late 39 home and my husband, being the 40 person, would be ready to pronounce me late once again. Maybe 41 I hurried, I could still make it home. I was heading inside to 42 for my gas when I noticed an older couple at the counter. I heard them asking for 43 to the local hospital. It was the same hospital that I had just 44 a few minutes ago. The young man at the counter was trying to be 45 in explaining how to get there, with two other people making 46 . One of them was 47 trying to give them a whole different route back. It was then that I walked over to the couple and said, “Would you like to follow me to the 48 ?” A look of 49 crossed the woman’s face. “I’m going right by there,” I said, which wasn’t a(an) 50 since I had just made up my mind to do 51 that. I got in my car and began the journey back. I was trying to watch to be sure they were right 52 me. It took only fifteen minutes to get there as rush hour traffic was beginning to 53 . I felt better than I had all day and my headache was nearly gone. Later, as I arrived home, my husband 54 , “So you aren’t ever late any more.” I said, “Sometimes it’s 55 to be late.”
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