银焊不能用于哪类金属的焊接（）。
A.镍铬合金
B.银钯合金
C.金铂合金
D.钴铬合金
E.以上均不能
参考答案：C
上市开放式基金的申购和赎回采取（）的原则。
A.金额申购、份额赎回
B.金额申购、金额赎回
C.份额申购、份额赎回
D.份额申购、金额赎回
—______ you ______ anything in that store?
—No, I ______, but Jim ______.[ ]
A. Did; bought; didn't; bought
B. Did; buy; didn't; bought
C. Did; bought; didn't; buy
D. Did; buy; didn't; did
