检验报告资质认定、实验室认可标识中的CNAS是指（） A.中国合格_爱下问搜题

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问题单项选择题

检验报告资质认定、实验室认可标识中的CNAS是指（）

A.中国合格评定认可委员会实施的自愿性实验室认可活动

B.国家认监委或省级质监部门的计量认证

C.国家认监委或省级质监部门对依法授权或依法设置的检验机构准予其承担法定产品质量检验工作的认可活动审查认可

D.食品检验机构资质认定

答案

参考答案：A

完形填空

完形填空。

     This is my bedroom. I can see  1 pictures on the wall. The light is  2 the desk. The football is  3 the
chair.  4 is the bed? It's near the table.
     My father and  5 bedroom is near my bedroom.  6 flowers and a bed  7 in their room. Some
windows are  8  the wall. A yellow door is in the wall, 9 .
      I like my bedroom and my parents like 10 .

( )1. A. a
( )2. A. under
( )3. A. in
( )4. A. Who
( )5. A. sister
( )6. A. The
( )7. A. is
( )8. A. on
( )9. A. also
( )10. A. their

B. one
B. on
B. under
B. What
B. mother
B. the
B. are
B. behind
B. there
B. they

C. any
C. in
C. to
C. Which
C. mother's
C. Some
C. isn't
C. in
C. here
C. them

D. some
D. behind
D. for
D. Where
D. brother
D. some
D. am
D. under
D. too
D. their room

问答题

【说明】
某一网络地址块192．168．75．0中有5台主机A、B、C、D和E，它们的IP地址及子网掩码如表4-1所示。
表4-1主机IP地址及子网掩码表

主　机	IP　地　址	子　网　掩　码
A	192.168.75.18	255.255.255.240
B	192.168.75.146	255.255.255.240
C	192.168.75.158	255.255.255.240
D	192.168.75.161	255.255.255.240
E	192.168.75.173	255.255.255.240

【问题5】
若在该网络地址块中采用VLAN技术划分子网，何种设备能实现VLAN之间的数据转发