If he had worked harder, he ______.
A. would succeed
B. should Succeed
C. would have succeeded
D. had succeeded
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下列各项中，属于一次凭证和累计凭证的主要区别是( )。
A. 一次凭证是记载一笔经济业务，累计凭证是记载多笔经济业务
B. 累计凭证是自制原始凭证，一次凭证是外来原始凭证
C. 累计凭证填制的手续是多次完成的，一次凭证填制的手续是一次完成的
D. 累计凭证是汇总凭证，一次凭证是单式凭证
密码与反密码配对时，不遵从碱基配对规律，称为
A. 密码的连续性
B. 密码的简并性
C. 密码的通用性
D. 密码的摆动性
E. 密码的排斥性
What actions have been take by the government
Another billion dollars on drought relief will be granted.
B. Next week the cabinet would discuss how to fight the drought.
C. The Prime Minister was not satisfied with farmers' complaints.
D. They Day more attention to farmers' depression and rising debt.
催化mRNA的3'端PolyA尾生成的酶是
A. 内含子
B. 多顺反子
C. RNA聚合酶Ⅱ
D. 原核RNA聚合酶口
E. 多聚A聚合酶
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