I can do many kinds of housework _______ cooking. I’ll learn it from my mother.A. for B. without C. except D. between 答案:【答案】C【解析】句意:我会做许多家务,除了做饭。我要和妈妈学它。for为了;without没有;except除了; between在……和……之间。根据I can do many kinds of housework 和 I’ll learn it from my mother.可知是除了做饭不会;故选C。下面是关于四棱柱的四个命题:
①若有两个侧面垂直于底面,则该四棱柱为直四棱柱
②若两个过相对侧棱的截面都垂直于底面,则该四棱柱为直四棱柱
③若四个侧面两两全等,则该四棱柱为直四棱柱
④若四棱柱的四条对角线两两相等,则该四棱柱为直四棱柱
其中,真命题的编号是
(写出所有正确结论的编号).