题目

下列叙述正确的是 A．液溴易挥发，在存放液溴的试剂瓶中应加水封 B．不慎将硫酸沾在皮肤上，立刻用干布擦净，然后用氢氧化钠溶液冲洗 C．实验室配制一定物质的量浓度的溶液，定容时仰视刻度线，所配制溶液浓度偏大 D．某溶液中加入BaC12溶液，产生了不溶于稀硝酸的白色沉淀，该溶液中一定含有Ag+11．假设你校学生会定于 4 月 10 日组织一次高三学生的登山活动，请根据以下提示，以学生会的名义用英语写一则通知，欢迎同学们积极参加．1．活动目的；2．集合时间；3．活动内容及注意事项．注意：1．词数 100 左右；2．可以适当增加细节，以使行文流畅；3．通知的格式已为你写好，不计入总词数．NoticeIn order to encourage Senior Three students to take exercise and relax themselves，we're going to organize a mountain-climbing activity on April 10．（高分句型一）We're to gather at the school gate and start at 7：20 a．m．by bus and get back at 7：00 p．m． We'll climb Mangshan Mountain in the morning，on the top of which we'll have a picnic at noon．（高分句型二）In the afternoon we'll be divided into groups and have a free time． Remember to take photos and make notes for the photo exhibition or the essay contest to be held later at our school．Besides，take your lunch and drinking water with you．If you want to join，please come to Student Union and sign up before April 5．Student UnionMarch 30．