有一个D/A转换器，其参考电压为5V，当输入的二进制数为1100时，_爱下问搜题

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问题单项选择题

有一个D/A转换器，其参考电压为5V，当输入的二进制数为1100时，转换成模拟电压为（）。

A.1.25V

B.2.5V

C.3.5V

D.3.75V

答案

参考答案：D

完形填空

完形填空。

Mike and I 1___________ good friends. 2___________ Sunday we are in 3___________ room. His room is
very clean and tidy. There 4___________ two windows in his room. Near the window there is 5___________
desk. On the desk 6___________ is a lamp 7___________ some books. 8___________ the desk there is a bed.
On the 9___________ there is a picture 10___________ Mike's family.

( ) 1. A. am
( ) 2. A. On
( ) 3. A. Mike
( ) 4. A. is
( ) 5. A. a
( ) 6. A. there's
( ) 7. A. and
( ) 8. A. Near
( ) 9. A. window
( ) 10. A. of

B. is
B. In
B. Mike's
B. are
B. an
B. their
B. or
B. In
B. bed
B. for

C. are
C. To
C. Mikes
C. be
C. two
C. there
C. with
C. On
C. wall
C. to

单项选择题

关于网织红细胞，错误的说法是（）

A.经瑞氏染色后可见到连成线状或网状的结构

B.胞质中含有RNA核糖体等嗜碱性物质

C.它是介于晚幼红细胞和成熟红细胞之间的未完全成熟红细胞

D.ICSH将网织红细胞分为Ⅰ～Ⅳ型

E.可用于判断骨髓的造血功能