下列各组地名中均为大洲分界的是[ ]
A．巴拿马运河，苏伊士运河
B．乌拉尔山，喜马拉雅山
C．乌拉尔河，亚马孙河
D．土耳其海峡，台湾海峡
答案：A
Signs and symptoms of retinal detachment include which of the following
A. Painless decrease in vision, a veil over the visual field, and flashing lights.B. A veil over the visual field, increased intraocular pressure, and yellow-green halos around visual images.C. Photophobia, yellow-green halos around visual images, and blurred vision.D. Unilateral eye inflammation, a cloudy cornea, and a moderately dilated pupil.
铝箔面石油沥青防水卷材可分为（）。
A、30标号
B、50标号
C、20标号
D、40标号
