HIV能通过细胞表面的CD4（﹣种受体蛋白）识别T细胞，如果给AIDS患者大量注射用CD4修饰过的红细胞，红细胞也会被HIV识别、入侵，因HlV在红细胞内无法增殖，红细胞成为HIV的“陷阱细胞”，这为治疗AIDS提供了新的思路．据材料分析．下列叙述不正确的是（　　）

我们日常生活中食用很多植物，下列属于单子叶植物的是（    ）

三十前面的一个数是（    ）

填写量词。

一____云      一____叶子     一____叮咛 

一____微笑    一____大树     一____整体

根据对话内容，从下面方框中选择适当的单词或词组填空，使对话内容完整正确。
medicine,      started,      terrible,      often,      wrong   
B: Bob                  D: Doctor
D: Come and sit down, Bob. What’s ____ with you?
B: I have a ____  pain in my stomach, doctor.
D: I see. When did it start?
B: It ____  yesterday. I didn’t want to eat anything. I’m not feeling well now.
D: Let me see, er, you have a fever.
B: I’ve got a headache, too. And my throat hurts.
D: Well, you’ve caught a bad cold.
B: I know these days the H7N9 flue is very popular. Is it serious?
D: No, not very serious, your temperature isn’t very high. Pay attention to your food and remember to wash your hands before meals. And you must stay in bed for 2 or 3 days and take the Chinese ____ .
B: How____ should I take it?
D: Three times a day after meals.
B: Thank you.