Ted: Hi, Christine. ______? Christine: Hi, Ted. I just bought a new camping tent. I can't
A.What's on
B.What's up
C.What's wrong
D.What's right
A.What's on
B.What's up
C.What's wrong
D.What's right
Why did the Phantom release Raoul in the end?
A.He was defeated by Raoul.
B.Christine saw his ugly face, and didn't love him any longer.
C.No woman had ever touched Christine, so he felt afraid.
D.Christine kissed him and he was pleased and deeply moved.
Led by______, the barons forced Henry HI to accept______.
A.Simon de Montfort; the Great Charter
B.Simon de Montfort; the Provisions of Oxford
C.Thomas Becket; the Great Charter
D.Thomas Becket; the Provisions of Oxford
A.thy
B.thích
C.chn
D.trng
A.F2、Cl2、Br2、I2的熔、沸点逐渐升高
B.HF、HCl、HBr、HI的热稳定性依次减弱
C.I4、CBr4、CCl4、CF4的熔、沸点逐渐降低
D.CH3CH3、CH3CH2CH3、CH(CH3)3、CH3CH2CH2CH3的沸点逐渐升高
A.金属晶体的熔点和沸点都很高
B.CH 4 、CCl 4 都是含有极性键的非极性分子
C.H
D.HCl、HBr、HI的稳定性依次增强
E.H 2 O是一种非常稳定的化合物,这是由于氢键所致
对某产品的需求预测如表9-12所示。
表9-12 对某产品的需求预测
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设:Cw为单位人工成本,每月分别为2520元/人、2400元/人、2760元/人、2520元/人、2640元/人、2640元/人;CH为招聘一个工人的费用,CH=450元/人;CL为解聘一个工人的费用,CL=600元/人;CI为维持单位产品库存一个周期的费用,CI=5元/件/周期;Pi为产品产量;产品单件工时为1h/件;Wi为工人数;Hi为招聘人数;Li为解聘人数;Ii为库存量;i为月份。试用线性规划模型求最优的总生产计划。
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