[单项选择]茶叶包装标签所用的计量单位必须是()。 A. 克(g)或千克(kg) B. 市斤 C. 公升 D. 立方米
参考答案:A
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第1题: [单项选择]The author mentions saber-toothed cats in line 16 as an example of a carnivore that A. ( became extinct before the Pleistocene epoch B. ( was unusually large for its time C. ( was not able to compete with humans D. ( caused the extinction of several species 参考答案:C
第22题: [填空题]假设有以下程序段: For i=1 To 3 For j=5 To 1 Step -1 Print i*j Next j Next i 则语句Print i*j的执行次数是______,i的值为______,j的值为______。 参考答案:15 4 0 答案解析:[解析] 本程序是一个双重For循环,外层循环循环变量i从1到3,共循环3次;内层循环从5到1每次递减1,共循环5次,这样一共循环15次。循环结束时,j的值是0;i的值是4。