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單項選擇題
Because her test turned out to be more difficult than she intended it to be, a teacher dec
ided to adjust the grades by deducting only half the number of points a student missed. For example, if a student missed 10 points, she received a 95 instead of a 90. Before the grades were adjusted the class average was A. What was the average after the adjustment？E．
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問答題
寰椎有（）E．
答案：
答案：寰椎有（1）E。寰椎（Atlas）是人體頸椎的第一節(jié)，它沒有椎體，主要由兩個側(cè)塊和前后的弓組成，形成一個環(huán)狀結(jié)構(gòu)，...
