搜题请搜索小程序“爱下问搜题”
问题 解答题
计算下列各式：
（1）
1
2
lg25+lg2-lg
0.1
-log29×log32；
（2）(0.064)-
1
3
-(-
5
9
)0+[(-2)3]-
4
3
+16-0.75+(0.01)
1
2
．
答案

（1）原式=lg5+lg2-lg10-

1
2
-2log23×log32=1+
1
2
-2=-
1
2
；

（2）原式=0.4-1-1+（-2）-4+2-3+0.1=

10
4
-1+
1
16
+
1
8
+
1
10
=
143
80
．

改错题

单句改错

1. It is only when he comes back can you leave.

2.  A child as he is,he knows a lot about computer games.

3. In he came when the bell rang.

4. So fast he ran that I couldn't follow him.

5. It was not until he told me did I know the news.
查看答案
判断题

刀具刃磨后，刀面越平整，表面粗糙度越小，刀具寿命越长。
查看答案