题目

Complete the sentences with the given words in their proper forms (用括号中所给单词的适当形式完成下列句子)【1】Here are some _________ about electricity. (story)【2】We live on the _________ floor. (five)【3】I am old enough to go to school by __________. (I)【4】Mr. Wind always shows off his ___________. (strong)【5】My son told me __________, “Although I work hard, I fail in the exam again.” (sad)【6】It is _________ to climb such a high mountain in half an hour. ( possible )对孟德尔选用豌豆做实验材料并获得成功的原因，下列解释中不正确的是（ ）A．豌豆具有稳定的、容易区分的相对性状B．豌豆是严格的闭花传粉植物C．豌豆在杂交时，母本不需去雄D．用数理统计的方法对实验结果进行分析