ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿·ÖÎöÊý¾Ý£¬»ñµÃÐÅϢʵÑéÊÒÏÖÓÐÁòËáͺÍÁòËáÄƵĹÌÌå»ìºÏÎïÑùÆ·£¬Ð¡Ã÷ͬѧÏë²â¶¨ÑùÆ·ÖÐÁòËá͵ÄÖÊÁ¿·ÖÊý¡£ÏȳÆÈ¡¸Ã»ìºÏÎïÑùÆ· 25g£¬ÍêÈ«ÈÜÓÚË®ÖУ¬È»ºóÈ¡ÓÃÁËÒ»¶¨ÈÜÖÊÖÊÁ¿·ÖÊýµÄÇâÑõ»¯ÄÆÈÜÒº 100g ƽ¾ù·ÖËĴμÓÈëÆäÖУ¬³ä·ÖÕñµ´£¬Ïà¹ØʵÑéÊý¾Ý¼Ç¼ÈçÏ£º
µÚ1´Î | µÚ2´Î | µÚ3´Î | µÚ4´Î | |
¼ÓÈëÇâÑõ»¯ÄÆÈÜÒºµÄÖÊÁ¿/g | 25 | 25 | 25 | 25 |
Éú³É³ÁµíµÄÖÊÁ¿/g | 4.9 | 9.8 | X | 14.7 |
Çë»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©ÉϱíÖÐ X µÄÊýֵΪ_____________£»
£¨2£©¼ÆËãÔ¹ÌÌå»ìºÏÎïÑùÆ·ÖÐÁòËá͵ÄÖÊÁ¿·ÖÊýΪ_____________£¿ (д³ö¼ÆËã²½Öè)
¡¾´ð°¸¡¿£¨1£©14.7£»£¨2£©96%
¡¾½âÎö¡¿
½â£º£¨1£©ÓɱíÖеÄÊý¾Ý¿ÉÖª£¬Ã¿25gÇâÑõ»¯ÄÆÈÜÒºÓëÁòËáÍ·´Ó¦Éú³ÉÁË4.9gµÄ³Áµí£¬µÚ2´Î¼ÓÈë25gµÄÇâÑõ»¯ÄÆÈÜÒºÄÜÍêÈ«·´Ó¦£¬Éú³ÉµÄ³ÁµíµÄÖÊÁ¿ÊÇ9.8g£¬µÚÈý´Î¼ÓÈë25g µÄÇâÑõ»¯ÄÆÈÜҺʱǡºÃ·´Ó¦Éú³É³ÁµíµÄÖÊÁ¿ÊÇ£¬4.9g¡Á3=14.7g£¬µÚËĴμÓÈë25g µÄÇâÑõ»¯ÄÆÈÜҺʱǡºÃ·´Ó¦Éú³É³ÁµíµÄÖÊÁ¿ÊÇ£¬4.9g¡Á4=19.6g£¬¶øʵ¼Ê²úÉúµÄÖÊÁ¿Îª14.7£¬ËùÒÔXµÄÖµ14.7g¡£
£¨2£©Éè¹ÌÌå»ìºÏÎïÑùÆ·ÖÐÁòËá͵ÄÖÊÁ¿Îªy£¬
½âµÃ£º y=24g
Ô¹ÌÌå»ìºÏÎïÑùÆ·ÖÐÁòËá͵ÄÖÊÁ¿·ÖÊýÊÇ£º=96%£¬
´ð£ºÔ¹ÌÌå»ìºÏÎïÑùÆ·ÖÐÁòËá͵ÄÖÊÁ¿·ÖÊýÊÇ96%¡£
¡¾ÌâÄ¿¡¿ÏÂÁÐͼÏóÄÜÕýÈ··´Ó³Æä¶ÔÓ¦¹ØϵµÄÊÇ£¨¡¡¡¡£©
A£®Ä³Î¶ÈÏ£¬ÏòÒ»¶¨Á¿µÄÏõËá¼Ø²»±¥ºÍÈÜÒºÖв»¶Ï¼ÓÈëÏõËá¼Ø¾§Ìå |
B.ÏòÏ¡ÑÎËáºÍÂÈ»¯ÍµÄ»ìºÏÈÜÒºÖмÓÈë¹ýÁ¿µÄÇâÑõ»¯ÄÆÈÜÒº |
C.ÏòÇâÑõ»¯ÄÆÈÜÒºÖеμӹýÁ¿µÄÏ¡ÑÎËá |
D.ÏòÊ¢ÓеÈÖÊÁ¿¡¢µÈÈÜÖÊÖÊÁ¿·ÖÊýµÄÏ¡ÁòËáµÄÁ½Ö§ÊÔ¹ÜÖУ¬·Ö±ð¼ÓÈë¹ýÁ¿µÄ½ðÊôþºÍÂÁ |