问题
选择题
一个两位数个位数字既是偶数又是质数,十位数字既不是质数又不是合数,则这个两位数是( )
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答案
十位数字既不是质数又不是合数,说明十位数字是1,
个位数字既是偶数又是质数,说明个位数字是2,
所以此数是:12.
故选:C.
一个两位数个位数字既是偶数又是质数,十位数字既不是质数又不是合数,则这个两位数是( )
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十位数字既不是质数又不是合数,说明十位数字是1,
个位数字既是偶数又是质数,说明个位数字是2,
所以此数是:12.
故选:C.
根据对话内容,选择恰当的句子补全下列对话。 | |
B: 1__________ Shall we go and watch it? A: 2__________ Let's go at half past two. B: 3__________ A: On the road outside the school gate. B: Are you going there by bike? A: 4__________ I like taking a bus. B: Yes. Taking a bus is much better than riding a bike. 5__________. A: OK. See you tomorrow. B: See you. |