题目内容

To apply to some universities, you must fill out the application form and include a short autobiography.

A. account of your life written by yourself
B. list of courses you have taken
C. list of schools you have attended
D. list of authors you have read

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Put the letter of the suitable definition next to each word.

免疫主要有哪几个方面的功能？

脾脏是人体内最大的免疫器官，在这里产生淋巴细胞。

A. 淋巴细胞
B. 血液
C. 溶菌酶
D. 抗体

中枢神经系统的毛细血管能限制血液中某些物质进入脑内，称（）。

A. 抗体
B. 血脑屏障作用
C. 防御功能
D. 免疫监视