修一条水渠,原计划每天修800米,6天可以修完。现在4天修完,每天应修多少米()
A.1500
B.1800
C.1200
D.1600
参考答案:C
某品牌食品包装中放有一包用作干燥剂的生石灰,生石灰的主要成分是( )
A.CaCO3
B.Ca(OH)2
C.CaSO4
D.CaO
She had just ______ the shell of the hard-boiled egg and was starting to peel it off.
A.snapped
B.cracked
C.fractured
D.burst