切换式换热器各组之间阻力不同时，对温度工况有什么影响，如何保证各组之间阻力尽可能地均

Long ago there was a man with the name Smith. He made a living by making caps. One day he went to sell his caps. He went through a forest. There were many monkeys in it. It was very hot. The man is very tired and wanted to have a rest. He came up to a large tree, put his caps on the ground, took one of them and put it on his head. Then he lay down and soon fell asleep.

　　“Where are my caps？” Smith cried when he woke up.He looked up and saw many monkeys in the tree and each monkey had a cap on its head.

　　“Give me back my caps！” the man shouted at the monkeys.But the monkeys didn't understand him.They only laughed.The man got angry，took off his own cap，threw it on the ground and cried，“If you want all my caps，you may take this one，too！”

　　And what do you think happened？The little animals did the same. Each monkey took off its cap and threw it on the ground. The man was very glad. He quickly collected all his caps and went on his way.

小题1:The cap­maker was so tired ______.

A．that he wanted some food

B．that he wanted to sell his caps in the forest

C．that he had to stop for a rest

D．that he wanted to return home小题2:He ______ and lay down and fell asleep soon.

A．put all his caps on his head

B．put all his caps on the ground

C．put all his caps in the tree

D．put one of his caps on his head小题3:When the man woke up，he found ______.

A．each monkey had a cap on its head 　　

B．some monkeys were stealing his caps

C．the monkeys were laughing at him　　

D．a monkey had stolen his cap and tried it on小题4:The man cried and told the monkeys ______.

A．to return his caps 　　

B．not to get away with his caps

C．to buy his caps 　　

D．not to laugh at him小题5:At last the monkeys threw the caps on the ground because ______.

A．they took pity on him 　　

B．the man had got angry

C．they didn't like the caps

D．they liked to do the same as the man did

白内障是由于

A．玻璃体浑浊

B．晶状体浑浊

C．角膜浑浊

D．角膜白斑

E．结膜浑浊

乙公司在李某与甲公司签订的劳动合同有效期内，许诺给李某更高的报酬，与李某签订了劳动合同，给甲公司造成了经济损失，乙公司对此应承担( )。

A．行政责任

B．说服李某回甲公司工作的责任

C．解除与李某签订的合同的责任

D．连带赔偿责任

阅读下面语段，回答问题：

现在的天文学，不是光研究太阳、月亮、星星在天上的位置和运行规律，还要研究星星里头的变化，研究宇宙的演化。

对这段话的准确复述是（　　　）。

A．现在天文学只研究星星里头的变化

B．现在天文学不仅研究星体的运行规律及其内部变化，而且还要研究宇宙的演变

C．现在天文学只研究太阳、月亮和星星在天上的位置和运行规律

D．现在天文学是一门综合性的学科

2006年10月2日，A公司与B公司签订了一份价值为200万元的设备买卖合同。该合同约定：(1)A公司于10月3日向B公司签发一张金额为人民币20万元的银行承兑汇票作为定金；(2)B公司于10月10日交付展览设备；(3)A公司于B公司交付展览设备之日起3日内付清货款；(4)任何一方违约，应当依照合同金额的20%向守约方支付违约金。
10月3日，A公司依约向B公司签发并交付了一张由C银行承兑和付款的金额为20万的银行承兑汇票，B公司在收到该汇票后，于10月4日将其背书转让给D公司。10月10日，B公司未向A公司交付设备，经A公司催告后至3月15日，B公司仍未交货，A公司遂于10月18日另行购买了设备，并通知B公司解除合同，要求B公司双倍返还定金40万元，同时支付违约金40万元。B公司收到A公司通知后未就解除合同提出异议，但不同意 A公司提出的双倍返还定金和支付违约金的要求。
10月9日，D公司取得的上述汇票不慎被盗。10月10日，甲某用盗得的上述汇票以D公司的名义向E公司购买汽车一辆，并以D公司的名义将该汇票签章背书转让给E公司作为支付购买汽车的价款。10月12日，E公司为支付F公司货款，又将该汇票背书转让给了 F公司。11月5日，F公司在该汇票到期日向C银行提示付款；C银行拒绝支付票款。
要求：根据上述事实，回答下列问题：
(1)A公司向B公司主张解除合同是否符合《合同法》的规定并说明理由。
(2)B公司收到A公司解除合同的通知后，双方之间签订的买卖合同是否已经解除并说明理由。
(3)A公司要求B公司双倍返还定金30万元，同时支付违约金20万元是否符合《合同法》的规定并说明理由。
(4)F公司可以向哪些当事人行使追索权并说明理由。