丝炭含量在精煤中达到()时,煤就不能结焦。
A.8%~10%
B.10%~12%
C.12%~15%
D.15%~18
参考答案:B
—How long are you staying?
—I don’t know. ______.
A.That’s ok
B.It depends
C.Never mind
D.It doesn’t matter
(2011年)根据风险与收益均衡的原则,信用贷款利率通常比抵押贷款利率低。( )