7ÔÂ6ÈÕ£¬ÉÂÎ÷Âå´¨²úÇø¼Û¸ñÔÝÎÈÔËÐУ¬¿ÍÉÌÒÔ·¢×Ô´æ»õԴΪÖ÷¡£¿ÍÉÌ»õÖ÷Á÷³É½»¼Û¸ñ70#3.8-4.0Ôª/½ï£¬75#4.3-4.4Ôª/½ï£¬80#4.5-4.6Ôª/½ï£¬70#Æð²½Ö÷Á÷4.1-4.2Ôª/½ï£¬ÒÔÖÊÂÛ¼Û¡£ºÃ»õ¼Û¸ñÆ«Ó²£¬Ò»°ã»õ¼Û¸ñ»ìÂÒ¡£ÊÜ¿â´æ»õÔ´Ë®ÀÃÓ°Ï죬¿ÍÉÌËùÒÔ·¢×Ô´æ»õԴΪÖ÷£¬Ä¿Ç°´òÏÂÀ´µÄË®ÀûõÔ´£¬¼Û¸ñÔÚ0.1Ôª/½ï×óÓÒ¡£