一种商品,先降价10%后,又涨价10%,结果价格是原价的百分之几?
1×(1-10%)×(1+10%),
=90%×110%,
=99%;
答:结果价格是原价的99%.
The police are offering ______ reward of $50,000 for information leading to the arrest of _____ murderer.
A.the; the
B.a; a
C.the; a
D.a; the
最常见的肠梗阻是
A.血运性肠梗阻
B.机械性肠梗阻
C.动力性肠梗阻
D.闭袢性肠梗阻
E.中毒性肠梗阻