var reg = /^(([1-9])|(1[0-2]))$/; var num = 1; console.log(reg.test(num)); num = 12; console.log(reg.test(num)); num = 13; console.log(reg.test(num)); 有图片为证:孰是孰非,一目了然!!!。
a bit 是指2113一点5261轻微的cold,而a little 指代不可数名词的少 a bit和a little都作"一点儿"讲,但用法不同4102. 1、a bit和a little在肯定1653句中修饰动词、形容词、副词和比较级时可以互换,表示"一点儿"的意思.例如: the speaker spoke up a bit/a little so as to make himself h...