去年4月央视曝光了“毒胶囊”事件，某些不良企业利用皮革废料加工制成药用胶囊．但合格的药用胶囊主要成分是淀粉，不经咀嚼直接吞服，这主要是保护哪个器官免受药物的刺激（  ）

亚欧第二条大陆桥在我国境内的铁路线有(    )

有两根长度分别为4cm，9cm的木棒，若想钉一个三角形木架，现有五根长度分别为3cm，6cm，11cm，12cm，13cm木棒供选择，可选择的方法有几种（   ）

我国耕地、林地、草地面积，由大到小排列的顺序是（    ）

Hi Jerry,

    Thank you1your invitation to2your school next week. I am sorry I3come. I'm not going to be4next week. On Monday, I have a piano lesson58:00 to 10:00 in the morning, and I have to study for the English test in the afternoon. On Tuesday, I am6a friend from my hometown at the airport. On Wednesday, I am7tennis with my friends. I have to look after my 8grandpa on Thursday. On Friday, I'm helping one of my classmates 9 his English. I am busy10week.