∵14425=125,
∴正数125的平方为14425;
∵(±43)2=179,
∴179的算术平方根是43.
To avoid _________ on how to operate the machine, you should first read the
instructions carefully.
A.to get confused
B.getting confused
C.to get confusing
D.getting confusing
M元素的1个原子失去2个电子转移到Y元素的2个原子中形成化合物Z,下列说法中正确的是 [ ]
A.Z的电子式为
B.Z可表示为M2Y
C.M 一定属于第ⅡA族元素
D.M可形成+2价阳离子