【OG20-P278-300题】The 9 squares above are to be filled with x's and o's,with only one symbol in each square.How many of the squares will contain an x?1.More than 1/2 of the number of squares will contain an o.2.Each of the 4 corner squares will contain an x.
Originally developed for detecting air pollutants, a technique called proton-induced X-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it, is finding uses in medicine, archaeology, and criminology.
【OG20-P171-163题】Each year for 4 years, a farmer increased the number of trees in a certain orchard by 1/4 of the number of trees in the orchard the preceding year. If all of the trees thrived and there were 6,250 trees in the orchard at the end of the 4-year period, how many trees were in the orchard at the beginning of the 4-year period?
Assume that, in the price category, a lower price constitutes a higher rating. For each of the following pairs of characteristics, select Yes if exactly one of the listed microwaves has the highest rating in both characteristics. Otherwise, select No.
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