题目

有三张大小、形状及背面完全相同的卡片,卡片正面分别画有正三角形、正方形、圆,从这三张卡片中任意抽取一张,卡片正面的图形既是轴对称图形又是中心对称图形的概率是. 答案:【1】23 此题要求改正所给短文中的错误。对标有题号的每一行作出判断:如无错误,在该行右边横线上画一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:   此行多一个词:把多余的词用斜线(﹨)划掉,在该行右边横线上写出该词,并也用斜线划掉。   此行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。   此行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。 注意:原行没有错的不要改。 Attention, please, everyone. We’ve accepted the            76. ______ weather forecast on the radio this morning that             77. ______ there will have a heavy rain tonight. Be sure               78. ______ to shut the windows and doors until you leave              79. ______ your classrooms. The sports meet when we planned to           80. ______ hold it tomorrow will be put off. After it becomes              81. ______ fine, we’ll make other announcement. We will                82. ______ have classes on Wednesday as usually. Since it is               83. ______ colder tomorrow, please dress on more clothes in time.           84. ______ Those come to school by bike, don’t keep your               85.______ umbrellas open while riding.
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