My father, Mr. White, often __________ at six twenty in the morning.
A:get up
B:go up
C:gets up
D:go to bed
地球上的淡水资源,绝大部分为( )
已知:2Al+2NaOH+2H2O═2NaAlO2+3H2↑,Fe、Cu均不与氢氧化钠溶液反应.
请问:
请回答下列问题:
(-0.9)2的算术平方根是( )