【判断题】在春秋战国时代,各民族根据不同的文化和生活方式,已经出现了非常清晰的划分。()
【单选题】Which of the following descriptions about the opening chapter in the novel is incorrect?
A.
The truth of selection process is concealed by a competition for twosomes.
B.
It is implied in this chapter that Noah has an appetite for animal flesh.
C.
There was never a “natural selection” among the animals.
D.
According to the narrator, though God is benevolent, the person that he chooses to preserve is not a nice man at all.
【简答题】根据2.52÷21=0.12,直接填空. 25.2÷21= 0.0252÷21= ______÷21=12.
【简答题】3 4 =______÷______= ( ) 12 = 21 ( ) .
【简答题】先计算一下12×42和24×21的积,看看它们相等不相等,原来12×42可以改写成12×2×21=24×21,所以12×42=24×21,这样的算式还有12×63=36×21等,你能再写一个吗?
【简答题】3÷4= () 12 =______%=21:______=______(小数).
【简答题】75=______:12=12()=21÷______=______%0.75=______:12= 12 () =21÷______=______%