原式=2tanα+13tanα-2=1,解得tanα=3.
故答案为:3
-----Nowadays, more senior students in the Chinese mainland are applying for admission to universities overseas after graduation.
-----________. But studying abroad may cost more.
A.I hope so
B.That’s the case
C.Not really
D.Sounds reasonable
CT的脊髓造影,其对比剂的注射方法是:()
A.动脉插管给药
B.静脉给药
C.通过口服给药
D.经腰穿蛛网膜下隙给药
E.通过直肠灌注给药