离心机工作时,在离心力和挤压里的作用下,留在颗粒表面的主要是()。
A、吸附水
B、自由水
C、吸附油
D、都不是
参考答案:A
下列哪一种酶不参与血小板的花生四烯酸代谢过程()
A.激肽释放酶
B.环氧化酶
C.血栓素合成酶
D.磷脂酶A2
E.cAMP
根据提示词定出恰当的问句或答语,完成对话。
1. A: _____? (your city)
B: Cool clothing is the best.
2. A: _____? (Jeans Corner, your school)
B: Ten minutes by bus.
3. A:_____? (think, China)
B: Ge You is the funniest actor.
4. A: What do you think about the TV show?
B: _____? (boring; all)
5. A: Why do you think Guangming Theater is the best?
B: _____. (comfortable seats)