下列物质性质的变化规律与分子间作用力有关的是（） A．H2O、_爱下问搜题

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问题选择题

下列物质性质的变化规律与分子间作用力有关的是（）

A．H₂O、H₂S、H₂Se、H₂Te的热稳定性依次减弱

B．金刚石的熔沸点高于晶体硅

C．NaF、NaCl、NaBr、NaI的熔点依次降低

D．CH₄、SiH₄、GeH₄、SnH₄的沸点逐渐升高

答案

答案：D

分子的稳定性和化学键强弱有关系，与分子间作用力无关，A不正确。B中属于原子晶体，熔沸点高低和共价键强弱有关系。C中是离子晶体，熔点大小和离子键强弱有关系。D中都是分子晶体，沸点大小和分子间作用力有关系，所以正确的答案选D。

完形填空

Once there was a very brilliant, creative and learned man. He gained much ____36_____while traveling throughout the world. Unfortunately he lost his legs and left arm in a traffic accident, leaving only a finger and thumb on his right hand. He became so ____37_____ that he was afraid he would spend his life _____38_____ and would no longer be able to use his life in a(n) ____39_____way.
One day, he remembered how he had always loved getting ____40_____. He realized that he still had partial ____41_____ of his right hand and could write with ____42_____. Then, he had an idea. “Why not write to other people who need encouragement?”
He ___43___ where he could find those who could be encouraged if they read his letters. He thought of people in ____44___. Many of them had hope of regaining their ____45___ . Others would keep feeling depressed and remain put away for the rest of their lives. He decided that he must try to __46____ them. So he wrote to a prison ministry about sending letters to the prisoners. The prison minister replied that writing to the prisoners would be ____47____. However, it would be against prison rules for the prisoners to write back.
____48_____with the intention, the man began sending 49 messages of God’s love, hope, strength, and encouragement. He wrote twice a week, testing his strength and ability to the ___50____. He poured his heart and soul into his words, ___51_____ his experience, sense of humor, optimism, and faith.
It was difficult to write those letters, especially without hope of any ___52___. Frequently, he felt discouraged, wondering if anyone ___53____read his letters. However, this was his ___54____chance，so he determined to continue.
At last, he received a letter from the prison officer, which said, “Please write on the best paper you can afford. Your letters are passed from cell (牢房) to cell until they almost fall to ____55___!”
We all have unique experiences, abilities and talents. We can discover ways to reach others in need of encouragement and strength.

B．embarrassed

C．comfortable

判断题

银行营销策略是指银行在复杂的、变化的市场环境中，为了实现特定的营销目标以求得生存发展而制定的全局性、决定性和长期性的规划与决策。( )