圆心在x轴上的两圆相交于A、B两点,已知A点的坐标为(-3,2),则B点的坐标是( )。
(-3,-2)
妊娠时,甲胎蛋白在羊水中的浓度最高的时间为
A.7周B.8周C.11周D.13周E.17周
If a person is taken_________ on April Fools' Day, he or she is called "April Fool".[ ]
A. up
B. off
C. in
D. on