如图，直线与双曲线相交于，两点，轴，轴，则面积的最小值为 ．
已知铅蓄电池Pb + PbO2 + 2H2SO4 ==2PbSO4 + 2H2O 在充电时作电解池，放电时作原电池。铅蓄电池上有两个接线柱，一个接线柱旁标有“+”，另一个接线柱旁
—______ do you go to school every day?—I go to school at half past seven.A. Where B. Who C. What D. When
______ Nancy likes best about college is that she can meet people from all over the country． A. Where B．When C．That D．What
下列句子标点符号的使用，正确的一句是 ( ) A．如何在这短短的两个月时间里，能够迅速地
反思当今时代的问题，人们越来越意识到不能只关心科学技术的发展，必须高度关注哲学的发展。哲学作为一种思辨的学科，给予社会发展巨大的智慧
— What is that building? — _____ the garden equipment is stored. A. There is in which B. That is where C. The building that D. That I got
