正确答案:
题目:今年,甲型H1N1流感病毒在许多国家发生,治疗该病毒的有效药物达菲是从八角茴香中经过多道复杂工艺提炼出来的,它的有效成分是莽草酸,化学式为C7H10O5.对莽草酸的下列说法错误的是( )
解析:D
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学习资料的答案和解析:
[单选题]( ) – Is Miss White __________ English teacher, Maria?– No, she teaches __________ geography.
your;us
[单选题]30. —What did the teacher say just now?—Sorry. I didn't catch it. I __________something else.
was thinking
解析:30.C【解析】由“我在想其他的事情”这一动作是发生在刚才老师说话时,故用过去进行时。