题目内容

两种流体的对流传热膜系数分别为αl和α2，当α1＜＜α2时，欲提高传热系数，关键在于提高__________ 的值才有明显的效果。

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对于粗糙表面的润湿，θ＜90度时，表面越粗糙润湿性能越______。

1. Both parties should abide by the contract and should refrain from revising, canceling, or terminating the contract without mutual consent.
2. The contract can be revised, canceled, or terminated with mutual consent. Before both parties have reached an agreement, the contract should be strictly observed.
3. Party A has the right to cancel the contract with a written notice to Party B under the following conditions:
(1) Party B does not fulfill the contract or does not fulfill the contract obligations according to the terms stipulated, and has failed to amend after Party A has pointed it out.
(2) According to the doctor's diagnosis, Party B cannot resume normal work after a continued 30 days sick leave.
4. Party B has the right to cancel the contract with a written notice to Party A under the following conditions:
(1) Party A has not provided Party B with necessary working and living conditions as stipulated in the contract.
(2) Party A has not paid Party B as scheduled.
1. Both parties should refrain from revising, canceling, or terminating the contract without mutual consent, but it can be revised, canceled, or terminated with【46】.
2. If Party B does not fulfill the contract or does not fulfill the contract obligations according to the terms stipulated, and has failed to amend after Party A has pointed it out, Part A has the right【47】with a written notice to Party B; or if Part B is badly sick, who cann't continue to work after asking for a continued【48】, Part A also has the right to cancel the contract with Party B. On the other hand, if the【49】for Part B is not the same as the one stipulated in the contract, or Party A has not【50】as scheduled, Party B has the right to cancel the contract with Party A.

SET TALK OFF
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Rend the text below. Write an essay in about 120 words, in which you should summarize the key points of the text and make comments on them. Try to use you own words.
As a Chinese saying goes, "Take your hand, and hold it forever. " Eternal love is what peo- ple dream of, and this kind of love truly exists in Heyuan city, Guangdong province.
Pan Tianci and Gao Di, who were born in 1919 and 1920 respectively, have spent 93 years together and been married for 81 years. Gao joined Pan&39; s family as a child bride when she was only two, and later got married at 14. Now they have a family boasting four generations and 15 members in total.
Marriages that have lasted more than 80 years are known as "oak marriages", and are very rare. It is said that only 20 or so couples in the world have oak marriages. Oak is labeled as the free of mystery. Being the tallest and exuberant tree in the world, oak tree is in charge of Cupid the god of love in the Greek ancient myth. Oak marriage refers to the 80 anniversary of marriage, which is derived from French, symbolized the love for a long time.
To celebrate Pan and Gao&39; s "oak marriage", an anniversary party was held in the village over the weekend.
Villagers say the couple stays in. good health, and the two of them usually hang out hand in hand. According to their 67-year-old son, Pan and Gao have always respected each other and never lost temper in the past, setting a good example for their progeny.