有P型半导体引出的电极是晶体二极管的()。
参考答案:正极
In march,2008, Medvedev was elected _______ president of Russia—________ position he will hold for 6 years.
A.a; a
B.不填;a
C.the; a
D.the; the
与华法林竞争血浆蛋白结合的药物是:
A.非那西丁
B.吲哚美辛
C.对乙酰氨基酚
D.以上都不是
E.保泰松