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		<title>Dao &amp;#273;&amp;#7897;ng &amp;#273;i&amp;#7873;u hoà</title>
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		<lastBuildDate>Mon, 04 May 2009 18:30:57 GMT</lastBuildDate>
		<ttl>10</ttl>
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			<title>Dao &amp;#273;&amp;#7897;ng &amp;#273;i&amp;#7873;u hoà</title>
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			<title>Bài 002 (DAO DONG DIEU HOA)</title>
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			<dc:creator>caongochung</dc:creator>
			<description>Trong các lo&#7841;i &#273;&#7897;ng th́

 

Ch&#7885;n m&#7897;t &#273;áp án d&#432;&#7899;i &#273;ây 



A. Dao &#273;&#7897;ng tu&#7847;n hoàn là m&#7897;t dao &#273;&#7897;ng &#273;i&#7873;u ḥa 

B. Dao d&#7897;ng c&#7911;a con l&#7855;c ḷ xo luôn là dao d&#7897;ng &#273;i&#7873;u ḥa 

C. Dao &#273;&#7897;ng &#273;i&#7873;u ḥa là m&#7897;t dao &#273;&#7897;ng tu&#7847;n hoàn 

D. Dao d&#7897;ng c&#7911;a con l&#7855;c &#273;&#417;n luôn là dao d&#7897;ng &#273;i&#7873;u ḥa  </description>
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			<pubDate>Mon, 04 May 2009 18:30:57 GMT</pubDate>
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			<title>Bài 001 (DAO DONG DIEU HOA)</title>
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			<dc:creator>caongochung</dc:creator>
			<description>M&#7897;t v&#7853;t dao &#273;&#7897;ng theo ph&#432;&#417;ng tŕnh  (cm,s) s&#7869; qua v&#7883; trí cân b&#7857;ng l&#7847;n th&#7913; ba vào th&#7901;i &#273;i&#7875;m t là: 

 

Ch&#7885;n m&#7897;t &#273;áp án d&#432;&#7899;i &#273;ây



A. 2,5 s 

B. 6 s 

C. 2,4 s 

D. 2 s 

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			<category>Dao &amp;#273;&amp;#7897;ng &amp;#273;i&amp;#7873;u hoà</category>
			<pubDate>Mon, 04 May 2009 18:22:06 GMT</pubDate>
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