问题
单项选择题
油品的电阻率在（）以上，是静电非导体。
A、1000Ω•m
B、1010Ω•m
C、1020Ω•m
D、1030Ω•m
答案
参考答案：B
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油品的电阻率在（）以上，是静电非导体。
A、1000Ω•m
B、1010Ω•m
C、1020Ω•m
D、1030Ω•m
参考答案：B
Don’t Wait Until Flowers Fade Each spring brings a new blossom of wildflowers in the ditches (路沟) along the highway I travel daily to work. There is one blue flower that has always my eye. I’ve noticed that it blooms only in the morning hours, and the afternoon sun is too warm it. Every day for approximately two weeks, I see those beautiful . This spring, I started a wildflower garden in our yard. I can look out of the window while doing the dishes and see the flowers. I’ve often thought that those lovely blue flowers from the ditch would look in that bed alongside wildflowers. Everyday I drove the flowers thinking, “I’ll stop on my way home and dig them.” “Gee, I don’t want to get my good clothes ...” Whatever the reason, I never stopped to dig them. My husband gave me a folding shovel(铁锹) one year to be used for that purpose. One day on my way home from work, I was to see that the highway department had moved the ditches and the pretty blue flowers were gone. I thought to myself, “Way to go, you too long. You it when you first saw them blooming this spring.” A week ago we were shocked and saddened to learn that my oldest sister-in-law has a terminal brain tumor(脑瘤晚期). She is 20 years older than my husband and , because of age and distance, we haven’t been as as we all would have liked. I couldn’t help but see the between the pretty blue flowers and the between my husband’s sister and us. I do believe that God has given us some time left to plant some valuable that will bloom every year for us. And yes, if I see the blue flowers again, you can bet I'll stop and them to my wildflower garden
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