实行村民自治和居民自治是人民当家作主最有效的途径。[ ]
√
—Mom. I'm so tired.I can't walk any further.
—________, my dear. You can make it.[ ]
A. Come on
B. No worry
C. That's impossible
D. No problem
已知水和煤油的质量之比是5∶4,比热容之比是2∶1,水的初温是18℃,煤油的初温是20℃。若它们吸收相等的热量,水的温度升高到40℃,则煤油升高到的温度是( )
A.120℃
B.100℃
C.75℃
D.55℃