古蔡法检查砷盐时，和溴化汞试纸生成砷斑的化合物是
A．HgBr2B．AsH3C．AsH(HgBr)2D．SnCl2E．K1
参考答案：B
She_________ TV this weekend. [ ]
A. goes to watch
B. is going to see
C. is going to watch
圆锥的底面是一个______，从圆锥的顶点到底面______的距离是圆锥的高．
