安全运行寿命就是设计寿命()
参考答案:错
After retirement, learning a musical instrument may be harder than ______ when you were a kid.
A.it may
B.it was
C.it does
D.it did
根据现在的市场情况,投资者预测,未来1年内,短期国库券利率上调的概率为55%,并且政府已经明确表示,未来1年内会调整短期国库券利率,那么,未来1年内,短期国库券利率下调的概率为()。
A.0
B.55%
C.45%
D.100%