昼夜分阴阳，则上午为
A．阴中之阳
B．阳中之阳
C．阳中之阴
D．阴中之阴
E．阴中之至阴
参考答案：B
若复数z满足1+zi=i（i是虚数单位），则z2的值为______．
At least 42 people _______ confirmed dead with another four still_______ after a massive landslide engulfed a village in Southwest China’s Yunnan province on Friday morning.
A．have been; missing
B．have; missing
C．have been; losing
D．have; losing
