以下物质保存方法错误的是
A.钠-煤油中
B.氢氟酸-塑料瓶中
C.白磷-水中
D.无水氯化钙-细口瓶中
答案:D
题目分析:无水氯化钙是固体物质,固体物质保存于广口瓶中,错误;
---European scientists announced that the speed of light isn’t the speed limit.
---Perhaps it is the biggest challenge to Einstein’s Theory of Relativity. No one _____ any crack in his
theory for more than a century. [ ]
A. has found
B. found
C. had found
D. would find
关于脂肪瘤的治疗,下列说法错误的是
A.多数情况下,可不处理
B.多发脂肪瘤不行手术,仅取其一作病理
C.无症状的皮下脂肪瘤应积极手术,以防恶变
D.脂肪瘤切除后应送病理,进一步明确其性质
E.切除时,应尽量连同包膜一并切除