EDTA对金属离子的络合能力随酸度的不同而不同，酸度越低，络合能力越强
参考答案：错
如图中的电路元件符号表示电动机的是 [ ]
A．
B．
C．
D．
The fact that she was foreign made ____ difficult for her to get a job in that country. [ ]
A. so
B. much
C. that
D. it
