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【单选题】
A study of marital relationships in which one partner s sleeping and waking cycles differ from those of the other partner reveals that such couples share fewer activities with each other and have more violent arguments than do couples in a relationship in which both partners follow the same sleeping and waking patterns. Thus, mismatched sleeping and waking cycles can seriously jeopardize a marriage. Which of the following, if true, most seriously weakens the argument above?A.
Married couples in which both spouses follow the same sleeping and waking patterns also occasionally have arguments than can jeopardize the couple's marriage.
B.
The sleeping and waking cycles of individuals tend to vary from season to season.
C.
The individuals who have sleeping and waking cycles that differ significantly from those of their spouses tend to argue little with colleagues at work.
D.
People in unhappy marriages have been found to express hostility by adopting a different sleeping and waking cycle from that of their spouses.
E.
According to a recent study, most people's sleeping and waking cycles can be controlled and modified easily.
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【单选题】断裂基因转录的正确过程是（）
A.
基因-mRNA
B.
基因一hnRNA--*剪接一mRNA
C.
基因一hnRNA-戴帽和加尾一mRNA
D.
基因一前mRNA-hnRNA—mRNA
E.
基因+前mRNA呻剪接、戴帽和加尾一mRNA
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【简答题】实现一个名为Person的类和它的子类Employee, Manager是Employee的子类,设计一个接口Add用于涨工资,普通员工一次能涨10%,经理能涨20%。 具体要求如下: (1)Person类中的属性有:姓名name(String类型),地址address(String类 型)并写出该类的构造方法; (2)Employee类中的属性有:工号ID(int),工资vage(double类...
【单选题】若正弦电压u1=60sin(ωt-30°)V,u2=10cosωt V,则
A.
u1相位滞后u2∠30°
B.
u2相位超前u1∠60°
C.
u1相位超前u2∠60°
D.
u2相位超前u1∠120°
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