在价值工程中，当价值系数()时，应优先作为改进的对象。
A.V>1
B.V<1
C.V=1
D.V≠1
参考答案：B
Our food supply _____. We’d better get some in case there’s ____ left.
A．is running out, none
B．has run out of, none
C．is using up, nothing
D．has used up, nothing
诺成性法律行为
