题目： 下列哪项属于免疫赦免部位（）A.结膜B.眼睑C.视网膜D.角膜E.巩膜 答案： 参考答案：D解析：眼前房、玻璃体腔、视网膜下腔，对外来移植组织或其他抗原的相对无反应状态，称为眼免疫赦免；正常角膜组织无血管和淋巴组织，都属于"免疫赦免"部位。
题型：完形填空 让我们一起走进阅读乐园吧！选择正确答案。 Thomas Edison（托马斯·爱迪生） Thomas Edison invented (发明) many 1 , although (尽管) he didn't have much school education (教育). How did he do all these? Because he knew how to 2 a lot of things that 3 not taught 4 the classroom. He got knowledge (知识) from books outside school. He worked hard all 5 life,and the most important (重要的) thing is that he knew how to use his head.( ) 1. A. things ( ) 2. A. studys ( ) 3. A. is ( ) 4. A. at ( ) 5. A. his B. thing B. studiesB. be B. on B. he C. somethingC. works C. are C. in C. they D. anything D. study D. does D. out D. him 查看答案
题型：选择题 图中 OP 表示价格，OQ 表示供给量和需求量，D 是需求曲线，S 是供给曲线。当某商品价格处于P1 时，该种商品A．供过于求B．供不应求C．替代品需求量减少 D．互补品需求量减少 查看答案
