答案:D
解析:
At first, there are n students in the class, and 6 of them are seniors. It follows that initially n-6 students are not seniors. If 7 juniors are added to the class, there will be n-6 + 7, or n+1, students in the class who are not seniors.
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答案:D
解析:
At first, there are n students in the class, and 6 of them are seniors. It follows that initially n-6 students are not seniors. If 7 juniors are added to the class, there will be n-6 + 7, or n+1, students in the class who are not seniors.
重點單詞 | 查看全部解釋 | |||
multiple | ['mʌltipl] |
想一想再看 adj. 許多,多種多樣的 |
聯(lián)想記憶 | |
initially | [i'niʃəli] |
想一想再看 adv. 最初,開頭 |