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男装卸工，40岁，腰扭伤，经治疗腰痛缓解，但仍有左下肢麻痛并放射，查体：腰背肌痉挛，沿坐骨神经走行有压痛，直腿抬高试验阳性。

为明确诊断首选的检查方法是（）

A.X线片

B.CT

C.MRI

D.ECT

E.肌电图

答案

参考答案：B

阅读理解

阅读小天地。根据短文内容判断下列句子的正(√)误(×)。

      It is Christmas Eve now. My sister and I are very busy. We are putting some colour lights and our

Christmas presents on the Christmas tree. There is also a big red star on top of the tree. My sister is putting

some Christmas cards on the shelf. There are cards for everyone in our family and there are some presents

for everyone, too.

( ) 1. It is Christmas day now.

( ) 2. My brother and I are very busy on that day.

( ) 3. There is also a big red star on top of the tree.

( ) 4. My sister is putting some Christmas cards on the tree.

( ) 5. There are cards and some presents for everyone.

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单项选择题

申农一韦弗模式把传播过程中的媒介细分为三种，即发射器、接收器和（）

A.讯息

B.信号

C.信道

D.噪音
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