(10分)根据有关知识回答下列问题: (1)在进行插条繁殖时,如果在枝条上保留一些正在生长的芽或幼叶,扦插枝条就容易生根,这是因为_____________________
棱长都是1的三棱锥的表面积为( ) A.B.C.D.
阅读下面的文字,按要求作文。 翻过山,出现了故乡的田园,亲人的笑脸;翻过山,观赏到美丽的风光,奇异的景观。这里的山是自然的山。 生活中还
为测定某黄铜样品中锌的含量,某同学称取20g黄铜(铜和锌的合金)样品于烧杯中,向其中加入稀硫酸至不再产生气泡为止,共消耗100g质量分数为9.8%的
We are considering ________the plan.A. being changed B. changing C. to change D. to be changing
Mother was so angry at all ______ I was doing _______ she walked out. A. that; that B. what; that C. what; as D. that; which
When ______ to make a list of universities in Britain, most people would start with Cambridge or Oxford. A.to ask B.asking C.asked