预拱度
参考答案:
为了平衡桥梁使用时的上部结构和施工时支架的各变形值,在桥梁浇筑时预先施加的一个上拱值。
流感病毒的临床特点有:()
A.急起高热、全身酸痛、乏力等中毒症状重
B.呼吸道症状轻
C.年幼及老年患者病情可持续发展
D.流感病毒肺炎抗生素治疗无效
E.流感病毒肺炎X线检查呈双肺弥漫性结节阴影,痰培养有流感嗜血杆菌生长
— ________
—Er…I want to buy my wife a gift for Christmas, but I don’t know what she would like.
A.What are you looking for, sir?
B.Welcome to our store, sir.
C.May I help you, sir?
D.What on earth do you want, sir?