题型:问答题 根据表格内容完成下列短文。 It's useful to know how much money we usually spend on different things. Then, if we also know how much money we will have, we can decide which things we should buy now and which things we can go without or wait for. Here is a student's weekly budget (预算) during the school year. Bus fares (车费) to class $5 Movies $6 Candy/Gum (口香糖) $5 Soft drinks $3 School lunches $10 CDs $10 Restaurants $15 Computer games $10 This student has only $50 a week to spend (花费). Therefore, he must spend less on some things or not have them at all. If he wants to save (节省) on bus fares, he can 1______ to class. If he doesn't buy any candy, he can save 2______ a week. Or he can save 3______ if he has no soft drinks. He can save on lunches if he brings his own. He may be able to save on VDs by borrowing them from his friends or 4______ second-hand (二手). He doesn't have to 5______ to the movies or restaurants. 查看答案
题型:问答题 某有机物的结构简式为,其性质有下列说法:①含酚羟基,遇FeCl3溶液显紫色②结构中的酚羟基、醇羟基、羧基均能与金属钠反应,lmol该有机物能与3mol钠反应③含有羧基,lmol该有机物与lmol NaHCO3反应④能与羧酸发生酯化反应,也能与醇酯化反应,也可以进行分子内酯化反应⑤能与Cu(OH)2发生反应,该有机物1mol与2.5mol Cu(OH)2反应上述说法错误的是 ( )A.只有②B.只有④C.只有⑤D.全部正确 查看答案
题型:问答题 下列哪些情况下行政机关可以依法变更或者撤回已经生效的行政许可?()A、行政许可所依据的法律、法规、规章修改B、准予行政许可所依据的客观情况发生重大变化C、行政许可所依据的法律、法规、规章废止D、授予行政许可的行政机关领导人更换 查看答案