do{……}while(表达式)；循环至少执行_____次。
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Lisa has handed in her application form ______ ago, and she's going for an interview ______.
A. two weeks, this week
B. three weeks, next week
C. two weeks, next week
Lisa is applying for a ______.
A. tourist visa
B. student visa
C. work visa
Lisa is not confident about getting the visa because _____.
A. her documents are not well-prepared
B. she was asked to wait for a long time
C. the embassy is very strict about the student visa
水准路线闭合差调整是对观测高差进行改正，方法是将高差闭合差按与测站数（或路线长度）成（）的关系求得高差改正数。
A. 正比例并同号
B. 反比例并反号
C. 正比例并反号D.反比例并同号
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