问题
选择题
某物流公司有6辆甲型卡车和4辆乙型卡车，此公司承接了每天至少运送280t货物的业务，已知每辆甲型卡车每天的运输量为30t，运输成本费用为0. 9千元；每辆乙型卡车每天的运输量为40t，运输成本为1千元，则当每天运输成本费用最低时，所需甲型卡车的数量是( )
A．6
B．5
C．4
D．3
答案
答案：C
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某物流公司有6辆甲型卡车和4辆乙型卡车，此公司承接了每天至少运送280t货物的业务，已知每辆甲型卡车每天的运输量为30t，运输成本费用为0. 9千元；每辆乙型卡车每天的运输量为40t，运输成本为1千元，则当每天运输成本费用最低时，所需甲型卡车的数量是( )
A．6
B．5
C．4
D．3
答案：C
Hi Jenny, Thank you for 小题1: me to go shopping with you this week. I’d love to go, but I really 小题2: these days. You know I am a schoolgirl. I have to go to school 小题3: weekdays and every evening I must do my homework. And I am going to see my grandma this Saturday. I am going to look after 小题4: because she is ill in hospital. 小题5: I am free this Sunday, I have to babysit my little sister at home. She is very 小题6: . However, are you and your little brother free this Sunday? Can you come over to my home? You can 小题7: a taxi. It only takes you ten 小题8: to my home by taxi. Then we four can enjoy 小题9: games together(一起). The two little kids 小题10: so happy to stay together and play. Come on, I am waiting for you. Kate |