一条公路已经修好147千米,还剩下30%没有修.这条公路全长多少千米?
147÷(1-30%),
=147÷70%,
=147÷0.7,
=210(千米);
答:这条公路全长210千米.
In the wartime, the masses devoted whatever they had to ______ the army in fighting against the Japanese.
A.have supported
B.support
C.having supported
D.supporting
(九)题4-25、题4-26,画出全剖的主视图;题4-27、题4-28,画出半剖的主视图。