下面哪项不是典型性肝脓肿的CT表现()A．平扫示低密度占位，中心_爱下问搜题

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问题单项选择题

下面哪项不是典型性肝脓肿的CT表现()

A．平扫示低密度占位，中心区CT值略高于水

B．多为圆或椭圆形，部分腔内有分隔

C．多数病灶边缘不清楚

D．脓肿周围出现不同密度环形带

E．增强扫描脓肿壁有较明显的强化，但强化持续时间很短

答案

参考答案：E

完形填空

At the beginning of this century, medical scientists made an interesting discovery; we are built not just of flesh and blood but also of time. They were        to show that we all have “a body clock”         us, which controls the        and fall of our body energies,        us different from one day to the next.
The        of “a body clock” should not be too        since the lives of most living things are controlled        the 24 hour night-and-day cycle. We feel        and fall asleep at night and become        and energetic during the day. If the 24 hour-cycle is        , most people experience unpleasant        . For example, people who are not        to working at night can find that        of sleep causes them to        badly at work.
      the daily cycle of sleeping and       , we also have other cycles which       longer than one day. Most of us would        that we feel good on some days and not so good on        ; sometimes our ideas seem to flow and at other times, they        do not exist.

D．interesting

D．Rather than

单项选择题

在全国推广“家电下乡”，对农民购买家电实行财政补贴从而扩大内需所体现的经济生活道理是（）

①财政有利于提高人民生活水平

②消费对生产有反作用

③价格影响需求

④宏观调控在资源配置中发挥基础性作用

A.①②

B.③④

C.②③

D.①③