2012年3月，科学家在大亚湾中微子实验中发现了一种新的中微子振荡，这一重要成果对于最终揭开宇宙起源和演化之谜有着重大意义。这一发现进一步佐
---I have some good news for you. You’ve been accepted as a member of our club. ---_____________ That’s great! A. Good idea! B. Pardon? C. Congratulations!
The teacher came to the classroom and demanded ____ what had happened. A. his students to tell him B. being told C. telling him D. to be told
It ______ me two hours to find your new house. A. cost B. took C. spent D. used
已知全集中有m个元素，中有n个元素．若非空，则的元素个数为( ) A． B． C． D．
我校数学老师这学期分别用A，B两种不同的教学方式试验高一甲、乙两个班（人数均为60人，入学数学平均分数和优秀率都相同，勤奋程度和自觉性都一
函数的图像一定经过点 （ ） A、 B、 C、 D、
学校电工要给教室安装一个三孔插座(如图所示)，其中接地的孔是A.a B.b C.c
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