ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾ£¬Ö»±ÕºÏ¿ª¹ØS3£¬µÆL1µÄ¹¦ÂÊΪ4W£¬Ö»±ÕºÏ¿ª¹ØS1ºÍS2£¬µÆL1µÄ¹¦ÂÊΪ9WÉèµÆË¿µç×è²»±ä£¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ
[ ]
A£®Ö»±ÕºÏS3ºÍÖ»±ÕºÏS1ºÍS2ʱ£¬µÆL1Á½¶ËµÄµçѹ֮±ÈÊÇ2:3
B£®L1¡¢L2Á½µÆµÆË¿µç×èÖ®±ÈÊÇ1£º2
C£®Ö»±ÕºÏS3£¬µÆL1ÏûºÄµÄ¹¦ÂÊΪP1£¬Ö»¶Ï¿ªS3£¬µÆL2ÏûºÄµÄ¹¦ÂÊΪP2£¬Ôò P1: P2=2:l
D£®Ö»±ÕºÏS1ºÍÖ»±ÕºÏS1ºÍS2ʱ£¬µç·ÏûºÄµÄ×ܹ¦ÂÊÖ®±ÈÊÇ3:2
B£®L1¡¢L2Á½µÆµÆË¿µç×èÖ®±ÈÊÇ1£º2
C£®Ö»±ÕºÏS3£¬µÆL1ÏûºÄµÄ¹¦ÂÊΪP1£¬Ö»¶Ï¿ªS3£¬µÆL2ÏûºÄµÄ¹¦ÂÊΪP2£¬Ôò P1: P2=2:l
D£®Ö»±ÕºÏS1ºÍÖ»±ÕºÏS1ºÍS2ʱ£¬µç·ÏûºÄµÄ×ܹ¦ÂÊÖ®±ÈÊÇ3:2
A
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿