点击前往👉1+X WEB前端中级 选择题-单选汇总1
点击前往👉1+X WEB前端中级 判断题汇总3
1.在MySQL中,创建一个购物表,其中一个字段是记录购物时间(要求精确到秒),则该字段比较合适的数据类型是( )。
A. DATE
B. TIME
C. DATETIME
D. TIMESTAMP
2.在Bootstrap4中,下列说法正确的是
A. <576px 像素的为超小屏幕,用 .col-*
B. ≥576px 像素的为小屏幕,用 .col-sm-*
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