正常情况下在眼表泪液中溶菌酶占的比例（） A.10% B.60% C.40%

综合填空。

     There is a 1      . Its 2       is Venice. The man and 3      , the 4       and young don't drive cars.

5       are no streets. Only small rivers are 6       and there. They look 7       streets. People go to

shops by boats. Young father may take a bus or ride a bike 8       work. The fathers there can

only ride 9       boats.

I need to call my friend David _____ coat I walked off by mistake yesterday.  [ ]

A. in whose

B. in that

C. with which

D. with her

高处坠落致脊髓损伤的患者，来院后哪项检查最能准确地确定脊髓损伤平面（）。

A.检查感觉平面

B.检查肢体的运动

C.检查肢体的温度

D.MRI检查

E.X线平片

Character流与Byte流的区别是( )。

A) 每次读入的字数相同
B) 前者带有缓冲，后者没有
C) 前者是块读写，后者是字节读写
D) 二者没有区别，可以互换使用

胆囊切除时，需要同时行胆总管探查的指征，下列错误的是（）

A.术前已证实或高度怀疑有胆总管结石

B.术中胆道造影证实有结石，胆道梗阻或胆管扩张

C.术中常规探查胆总管作为一种诊断手段

D.术中发现胆总管扩张，管壁增厚或扪及胆总管结石、蛔虫或肿块

E.胆总管内抽出脓性、血性或泥沙样胆色素颗粒