yesterday we visited John．He said his health was _________ (改善，提高)．
yesterday we visited John．He said his health was _________ (改善，提高)．
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The last time Ihere, she at a medical college.()A. was visiting; studiedB. visited; studiesC. visited; was studyingD. was visiting; was studying
下列不能从“yesterday”中取出字符串“yes”的函数是()。 A、MID(“yesterday”，1，3)B、LEFT(“yesterday”，3)C、MIDB(“yesterday”，1，6)D、RIGHT(MID(“yesterday”，1，3)，3)
链接元素的伪类需要按一定的顺序定义，下面哪 个顺序是正确的（）A．link, a:visited , a:hover , a:activeB．a:link, a:hover , a:visited ,a:activeC．a:visited ,a:link, a:hover , a:activeD．可以随便写
7、链接元素的伪类需要按一定的顺序定义，下面哪 个顺序是正确的（）A．link, a:visited , a:hover , a:activeB．a:link, a:hover , a:visited ,a:activeC．a:visited ,a:link, a:hover , a:activeD．可以随便写
【单选题】图片加链接后有浏览器默认的边框，可以用以下哪种方法清除默认边框（）。A．img{ border:0px;}B．img:visited{border:0px}C．img a:visited{text-decoration:underline}D．img a:visited{text-decoration:underline }