--- What do you think of his idea?
--- It sounds but it just might work.
A:nice
B:healthy
C:crazy
D:successful
下列铁路干线中,不属于东北地区的是 ( )
一个分数,如果加上它的一个分数单位就得1,如果减去它的1个分数单位就得 45 .这个分数是____.
如图所示,电路两端的电压U保持不变,电阻R1,R2,R3消耗的电功率一样大,电阻之比R1:R2:R3是( )