1£®µÈ²îÊýÁеÄÏàÁÚ4ÏîÒÀ´ÎÊÇ £¬Ôò µÄÖµ·Ö±ðÊÇ£¨   £©

£¨A£©          £¨B£©1,6     £¨C£©2,7         £¨D£©ÎÞ·¨È·¶¨

2£®ÒÑÖª Âú×ã £¬ÇÒ £¬ÔòÏÂÁÐÑ¡Ïî²»Ò»¶¨³ÉÁ¢µÄÊÇ£¨   £©

£¨A£©      £¨B£©     £¨C£©      £¨D£©

3£®ÒÑÖªÖ±Ïß £¬Ö±Ïß £¬Èô £¬Ôò µÄֵΪ£¨   £©

£¨A£©         £¨B£©2      £¨C£© »ò          £¨D£©·ÇÒÔÉÏÑ¡Ïî

4£®ÔÚ ÖУ¬ ·Ö±ðÊÇ½Ç µÄ¶Ô±ß£¬ÏÂÁеÈʽÖУ¬ÕýÈ·µÄÊÇ£¨   £©

£¨A£© ¡¡¡¡¡¡¡¡¡¡¡¡£¨B£©

£¨C£© ¡¡¡¡¡¡¡¡¡¡¡¡ £¨D£©