六二式指北针的用途有哪些？（）
A、判定方位
B、标定坐标
C、测方向角
D、测坡度里程
参考答案：A, B, C, D
拉曼光谱证实溶液中不存在 ，实际存在［Al(OH)4］-。200 mL 0.2 mol•L-1 Na［Al(OH)4］溶液与250 mL 0.2 mol•L-1 H2SO4混合，完全反应后，溶液中Al3+与 物质的量之比为（ ）
A．4：5
B．2：3
C．2：5
D．1：2
Questions 7-10Complete the notes below.Write NO MORE THAN THREE WORDS for each answer.Adult Learners" WeekNo cost but must make (7) —September 1-8Techno Expo—Learn how to use (8) —Learn about online security issues and online entertainment—Monday, 1-4.30 pm (9) —Consider values—Learn how to attain harmony—Wednesday, 1-4.30 pmVenue: (10)
Questions 7-10
NO MORE THAN THREE WORDS
