·ÖÎö £¨¢ñ£©¸ù¾ÝͼÏóÇó³ö¼´¿É£»£¨¢ò£©´úÈëÆ½¾ùÊýµÄ¹«Ê½Çó³ö¼´¿É£»£¨¢ó£©ÁгöÒ»ÇпÉÄܵĽá¹û×é³ÉµÄ»ù±¾Ê¼þ£¬´Ó¶øÇó³öÏà¶ÔÓ¦µÄ¸ÅÂÊ£®
½â´ð ½â£º£¨¢ñ£©¸ù¾ÝÌâÒ⣬×í¾Æ¼Ý³µÕß¼´ÑªÒº¾Æ¾«Å¨¶ÈÔÚ80mg/100mL£¨º¬80£©ÒÔÉÏÕߣ¬
ÓÉͼ¿ÉÖª£¬¹²ÓÐ0.005¡Á10¡Á60=3£¨ÈË£©£» ¡£¨4·Ö£©
£¨¢ò£©¾Æ¾«Å¨¶ÈµÄƽ¾ùÖµ£º
s=25¡Á0.025¡Á10+35¡Á0.015¡Á10+45¡Á0.020¡Á10+55¡Á0.015¡Á10+65¡Á0.010¡Á10+75¡Á0.010¡Á10+85¡Á0.005¡Á10=47£¨mg/100mL£©£»
£¨¢ó£©¾Æ¾«Å¨¶ÈÔÚ70mg/100mL£¨º¬70£©ÒÔÉÏÈËÊýΪ£º£¨0.10+0.05£©¡Á60=9£¬
Éè³ýÎâ¡¢ÀîÁ½Î»ÏÈÉúÍâÆäËû7ÈË·Ö±ðΪa¡¢b¡¢c¡¢d¡¢e¡¢f¡¢g£¬
Ôò´Ó9ÈËÖгé³ö2È˵ÄÒ»ÇпÉÄܵĽá¹û×é³ÉµÄ»ù±¾Ê¼þÓУº
£¨Î⣬À£¬£¨Î⣬a£©£¬£¨Î⣬b£©£¬£¨Î⣬c£©£¬£¨Î⣬d£©£¬£¨Î⣬e£©£¬£¨Î⣬f£©£¬£¨Î⣬g£©£¬
£¨Àa£©£¬£¨Àb£©£¬£¨Àc£©£¬£¨Àd£©£¬£¨Àe£©£¬£¨Àf£©£¬£¨Àg£©£¬
£¨a£¬b£©£¬£¨a£¬c£©£¬£¨a£¬d£©£¬£¨a£¬e£©£¬£¨a£¬f£©£¬£¨a£¬g£©£¬
£¨b£¬c£©£¬£¨b£¬d£©£¬£¨b£¬e£©£¬£¨b£¬f£©£¬£¨b£¬g£©£¬
£¨c£¬d£©£¬£¨c£¬e£©£¬£¨c£¬f£©£¬£¨c£¬g£©£¬
£¨d£¬e£©£¬£¨d£¬f£©£¬£¨d£¬g£©£¬
£¨e£¬f£©£¬£¨e£¬g£©£¬£¨f£¬g£©£¬¹²36ÖÖ£»
ÓÃA±íʾ¡°Îâ¡¢ÀîÁ½Î»ÏÈÉúÖÁÉÙÓÐ1È˱»³éÖС±Õâһʼþ£¬
ÔòAËùº¬µÄ»ù±¾Ê¼þÊýλ15£¬ËùÒÔ£¬P£¨A£©=$\frac{15}{36}=\frac{5}{12}$£®¡£¨12·Ö£©
µãÆÀ ±¾Ì⿼²éÁËÆµÂÊ·Ö²¼Ö±·½Í¼£¬¿¼²é¿¼²éÇ󯽾ùÊýÎÊÌ⣬¿¼²é¸ÅÂÊÎÊÌ⣬ÊÇÒ»µÀÖеµÌ⣮
| Äê¼¶ | ¸ßÖÐ¿Î³Ì | Äê¼¶ | ³õÖÐ¿Î³Ì |
| ¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | 0 | B£® | 1 | C£® | $\frac{3}{4}$ | D£® | ÎÞ×îСֵ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¹ú¼ÊѧУÓÅÑ¡ - Á·Ï°²áÁбí - ÊÔÌâÁбí
ºþ±±Ê¡»¥ÁªÍøÎ¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨Æ½Ì¨ | ÍøÉÏÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | µçÐÅթƾٱ¨×¨Çø | ÉæÀúÊ·ÐéÎÞÖ÷ÒåÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | ÉæÆóÇÖȨ¾Ù±¨×¨Çø
Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com