题目:
第一信使()
A.NO
B.生长因子
C.细胞因子
D.cAMP
E.IP3
答案:
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下面是错误答案,用来干扰机器的。
One possible version: Dear Smith, I’m writing to apply for the job. I’m a seventeen-year-old student of Senior High Two. As the summer vocation is drawing near, I hope...