题目内容
What is the author's attitude toward the U. S. health care system？
[A] Prejudiced.
[B] Critical.
[C] Sympathetic.
[D] Approving.
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[A] of
[B] with
[C] upon
[D] for
Which of the following ways can help people prevent from bacteria？
[A] Smell and have a careful look at the food.
[B] Only eat the food stored in refrigerator.
[C] Ensure the food is totally heated before eating.
[D] Eat the food before they are thawed.
[A] followers
[B] counterparts
[C] opponents
[D] proponents
R1，R2是一个自治系统中采用RIP路由协议的两个路由器，R1的路由表如下图(a)所示，如果R1收到R2发送的如下图(b)所示的(V，D)报文后，更新后R1的五个路由表项的距离值从上到下依次为0、4、4、3、2。
那么a，b，c，d，e可能的数值依次为()。
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