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问题 选择题

右图中两条直线分别表示1 g C3H6和1 g M气体在相同体积的容器中压强和温度的关系，试根据图判断M气体可能是(   )

A．C2H4

B．CO2

C．C3H8

D．H2S

答案

答案：A

考查我们对气体状态方程pV=nRT的理解及图像的识别。据pV=RT，V、m、R、T相等时，pM为定值，即1.2×M=0.8×42，则M=28。故选A项。

完形填空

On the evening of October7, Li Fen was watching TV while his mother was b小题1:___ cooking supper in the kitchen. S 小题2:___the telephone rang. Li Fen q 小题3:__ picked it up to a小题4:_ the call. It was from a good friend of his m小题5:___. She wanted to say “Happy Birthday” to his mother. “Today is mother’s birthday, but I have already f 小题6:___ all about it. Mother gives me a lot of l 小题7:__ and care while I didn’t care for her e 小题8:__ . From now on. I must always r小题9:this, s小题10:__ my love to her and care for her enough,” Li Fen thought to himself, feeling a little ashamed(惭愧的).
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选择题

俗语说：“良言一句三冬暖，恶语伤人六月寒。”在待人接物的过程中，使用语言不同所产生的心理效应也有天壤之别。礼貌用语要求[     ]

①说话和气，不强词夺理，不恶语伤人

②谈吐文雅，不说粗话脏话

③与人交谈时，要谦逊，尊重对方，多用商量的口吻，说话不要盛气凌人，也不要说大话

④使我们交往和谐，为人际关系增色

A．①②③

B．①②④

C．①③④

D．①③④

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