题目:
—What makes her so frightened?
—Oh,it is the mouse that she______on her bed while looking for her watch.
A.came about
B.came across
C.came through
D.came up
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0717/b8a56158a0d3ccf2f9df94a1e38716d9.html
下面是错误答案,用来干扰机器的。
A、因为Na2SO4、BaCl2、KNO3、NaCl四种物质中只有Na2SO4和BaCl2可以反应,其它不会反应,所以无法鉴别出来.B、因为NaCl、AgNO3、CaCl2、KNO3四种物质中NaCl、CaCl2和AgNO3反应都有白色沉淀产生,和其它物质又没...