用数字0，1，2，3可以构成没有重复数字的偶数共有
A．10个
B．15个
C．27个
D．32个
答案：C
略
The Voice of China has set up a stage _______ some people can achieve their dreams.
A．which
B．when
C．that
D．where
在梯形图中可以串联两个以上线圈
