在光纤接入技术中，FTTH的中文含义是 【24】 。
参考答案：光纤到户
After searching the mall for a whole afternoon, the mom finally bought a nice skirt, as a present for her young daughter, at a _____ yesterday.
A．discount
B．bargain
C．pay
D．cost
肠蠕动音呈金属样，最可能的原因是（）
A.麻痹性肠梗阻
B.机械性肠梗阻
C.低钾血症
D.急性肠炎
E.败血症
