题目

摘录信息 （共5小题；每小题1分，满分5分） 阅读下面短文，根据所读内容在文后第53至第57小题的空格里填上适当的单词或短语，并将答案转写到答题卡上。 注意：每空不超过3个单词。    The United States provides more than half the world’s food aid. American programs gave about two billion dollars last year.    But critics say the current system wastes money and delays the arrival of needed food. Under current law, United States government agencies have to buy Am {007}erican-produced food. And 75% of the aid must be carried o下列细胞的各种结构中，具有由磷脂和蛋白质构成的膜的一组是（ ）①细胞膜 ②线粒体 ③高尔基体 ④中心体 ⑤染色体 ⑥核膜 ⑦内质网 ⑧核糖体A．①②③⑤ B．①②③⑥⑦ C．①④⑥⑦⑧ D．①②④⑤⑦