题目内容

Do you have an afternoon ______ this week to meet the President

A. obtainable
B. available
C. visible
D. reliable

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A型题非水碱量法使用高氯酸滴定液是因为（）

A. 高氯酸无腐蚀性
B. 在冰醋酸介质中高氯酸是最强的酸
C. 高氯酸价格便宜
D. 硫酸、盐酸中合有少量的水
E. 可使用多种方法指示终点

建设工程项目进度计划系统分为( )个层次。

A. 3
B. 4
C. 5
D. 6

It is not considered ______ to pick one's teeth in public.

A. respectful
B. respected
C. respectable
D. respective

The Lewis and Clark expedition ______ the territory of the Louisiana Purchase and beyond as far as the Pacific Ocean.

A. located
B. searched
C. exploited
D. developed