【2011·7】若方程组仅有零解，则k≠()。
A.-2
B.-1
D.2
正确答案是D
Complete each of the following sentences with a (compound) word derived from the one(s) given in brackets.
The couple expressed their （ ）thanks to the young man who had saved their son by donating one of his kidneys.(heart,feel)
仅有零解，则k≠()。
仅有零解，则k≠()。仅有零解，则k≠()。