The Great Wall of China is 2,300 years old.It is a wall.

A photocopy firm purchased office equipment from Hougas Equipment Co. for $5,300, paying $2,300 in cash and agreeing to pay the rest next month. The entries are: Dr. Office Equipment $5,300 Cr. Cash $2,300 __________ $3,000

What is the tuition fee for a part-time student（） A: $2,000. B: $2,300. C: $2,030. D: Not mentioned.

出口报关单上“300欧元”的运费总价填报正确的是( ) A: 300/300/1 B: 300/300/3 C: 303/300/2 D: 502/300/3

在一份出口货物报关单上，300欧元的运费总价填报正确的是（） A: 300/300/1 B: 300/300/3 C: 303/300/2 D: 502/300/3

诊断ALI时应（） A: PaO₂/FiO₂>300 B: 200/FiO₂≤300 C: 200≤PaO₂/FiO₂<300 D: PaO₂/FiO₂≤200 E: PaO₂/FiO₂≤100

“运费”栏应填报( )。 A: 502/300/3 B: 502/300/2 C: 300美元 D: 此栏不填

下列Lingo中不能正常运行的是 A: Model:[opt]min=2*x1+6*x2*x3;x1+x2>=100;4*x1+x2<=300;end B: Title:傻瓜程序;min=2*x1+6*x2*x3;x1+x2>100;2*x1+x2<300; C: !傻瓜程序;min=2*x1+6*x2*x3;x1+x2>=100;4*x1+x2<=300; D: !傻瓜程序[opt]min=2*x1+6*x2*x3;[st1]x1+x2>100;[st2]2*x1+x2<300;

下列Lingo中不能正常运行的是 A: Model:[opt]min=2*x1+6*x2*x3;x1+x2&gt;=100;4*x1+x2&lt;=300;end B: Title:傻瓜程序;min=2*x1+6*x2*x3;x1+x2&gt;100;2*x1+x2&lt;300; C: !傻瓜程序;min=2*x1+6*x2*x3;x1+x2&gt;=100;4*x1+x2&lt;=300; D: !傻瓜程序[opt]min=2*x1+6*x2*x3;[st1]x1+x2&gt;100;[st2]2*x1+x2&lt;300;

​选出下列模型的相应的Lingo程序‌​[img=183x126]1803bc668fe6bee.png[/img]‌ A: min=2x1+6x2*x3;x1+x2>=100;4x1+x2<=300;@gin(x3); B: min=2*x1+6*x2*x3;x1+x2>100;2*x1+x2<300;@bin(x3);@free(x2); C: min=2x1+6x2*x3;x1+x2>=100;4x1+x2<=300;@bin(x3); D: min=2*x1+6*x2*x3;x1+x2>100;2*x1+x2<300;@gin(x3);@free(x2);