A

    Ann is a basketball star. She is 18 years old. She usually gets up at six o'clock. She eats breakfast at seven. Ann and her friends usually play basketball from eight to twelve o'clock. At twelve o'clock she has lunch. School starts at two o'clock, she plays basketball again. At six thirty she has dinner. Ann usually does her homework at eight. At nine thirty she watches TV. Ann usually goes to bed at eleven. Basketball is her life!

根据短文内容,判断句子正误。

小王和小李两同学分别用电阻箱、电压表测量不同电源的电动势和内阻．

雍正皇帝曾显示：“农为天下之本务，而工贾皆其末也。”这一政策（ ）
①巩固了农业的基础地位 ②阻碍了海外贸易的发展 ③促进了社会经济转型 ④导致官僚、地主和商人三维一体商业发展模式的产生

1960年底，***大力提倡调查研究，并于次年亲自深入农村调查。其目的是(　　)