x |
4 |
y |
3 |
z |
2 |
3x-y |
3z-y |
A.
| B.1 | C.2 | D.3 |
x |
4 |
y |
3 |
z |
2 |
3x-y |
3z-y |
3×4k-3k |
3×2k-3k |
9k |
3k |
A.800cm | B.800dm | C.800m | D.800km |
a-b |
b |
3 |
5 |
a |
b |
a |
c |
c |
b |
A.6cm | B.7cm | C.8cm | D.9cm |
A.1cm,3cm,4cm,6cm |
B.30cm,12cm,0.8cm,0.2cm |
C.0.1cm,0.2cm,0.3cm,0.4cm |
D.12cm,16cm,45cm,60cm |
© 2017-2019 超级试练试题库,All Rights Reserved.