both can

要勤学苦练呀

苟同！:)

这不是省的问题.
6楼的解释精辟.

<P>

原帖由 <I>mumu0211</I> 于 2007-3-12 20:27 发表 <A href="https://www.njzxxyy.com/bbs/redirect.php?goto=findpost&amp;pid=157276&amp;ptid=17714" target=_blank><IMG alt="" src="https://www.njzxxyy.com/bbs/images/common/back.gif" border=0></A> in a week 　在一周内　　a week　一周，每周！

</P>
<P>　正确～！</P>

of course  it's right  ,there is no doubt about it .

同意我觉得可以省略