Why does the speaker think the driving test is a terrible experience?
A.Government officers are hard to please.
B.The learner usually fails several times before he passes it.
C.The learner has to go through several tough tests.
D.The driving test usually last two months.
第9题
水飞蓟素具有的生物活性最主要是
A、关于溃疡有抑制作用
B、具有维生素P样作用
C、有很强的保肝作用
D、治疗心血管疾病的作用
E、降压作用
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