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问题 单项选择题

肾盂肾炎尿液中每小时白细胞排泄率可达

A．10万/h
B．25万/h
C．30万/h
D．40万/h
E．45万/h

答案

参考答案：D

解析：肾盂肾炎白细胞排出增多，可达40万/h。

问答题 简答题

何为断层的三要素？
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单项选择题

Soon, more of the information we receive via the Internet could come (71) in digital wrappers.

Wrappers are made up (72) software code that’s targeted to do specific things with the data (73) within them, such as helping to define queries for search engines. They also keep (74) from (75) access to that code.

（72）处填（）。

A．of

B．off

C．on

D．out
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