Which of the following statements about sampling errors is FALSE（）

A. Sampling errors are errors due to the wrong sample being selected from the population.

B. Sampling error is the difference between a sample statistic and its corresponding population parameter.

C. Sampling errors will vary from one sample to the next.

1949年8月15日，为了保卫北平的安全，根据周恩来的指示，军委航空局在北平南苑机场组建了我军第一个（）

A.飞行中队

B.飞行大队

C.飞行团