木材有无颜色？有何利用价值？_爱下问搜题

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问题问答题简答题

木材有无颜色？有何利用价值？

答案

参考答案：

木材具有显著的颜色，木材固有的颜色对识别木材及上艺性都有很高的适用价值。材色确定木材品质优劣，工艺性质良好的木材早自然色，如遭菌类撼染则其颜色改变

完形填空

完形填空。

     My name is Sam. This is my friend,     1     name is Ken.    2   are from the UK. Ken's father Mr. Green
is a doctor (医生),    3   works in London (伦敦). Ken's    4   Mrs. Green is a teacher,    5   works in a
school.    6   are busy (繁忙的). Ken has a sister, Marry.    7   is only five years old. Ken likes Marry and
plays with    8    .
     Ken and I    9   classmates.    10   teacher Miss White is very friendly.

( )1. A. he
( )2. A. He
( )3. A. she
( )4. A. mother
( )5. A. he
( )6. A. We
( )7. A. It
( )8. A. she
( )9. A. are
( )10. A. We

B. him
B. We
B. he
B. cousin
B. she
B. You
B. She
B. him
B. is
B. Us

C. his
C. They
C. it
C. aunt
C. it
C. They
C. He
C. her
C. am
C. Our

单项选择题

在网络中，解释IP地址正确的是（）

A.表示网络的规模大小。

B.表示主机和域名的对应关系。

C.IP地址由36位二进制的数字组成。

D.在Internet网上，每个网络和每一台计算机都被唯一分配一个地址，这个地址在整个网络中是唯一的。