第24题: [单项选择]The woman talks to the professor________. A. because she wants him to recommend books B. because she wants to apply to graduate schools C. because she wants to take an advanced course D. because she wants him to give her a good grade 参考答案:C
第25题: [单项选择]散射比浊分析中,多采用() A. Mile原理 B. Rayleigh原理 C. Fahey原理 D. Mancini原理 E. Sternberg原理 参考答案:B 答案解析:当入射光通过时,如颗粒直径比入射光波长小很多,则散射光的分布比较均匀,为Rayleigh散射。如颗粒直径接近入射光波长,则散射光分布明显不均匀,为Mile散射。
第38题: [单项选择]打开一个数据库的命令是________。 A. USE B. USEDATABASE C. OPEN D. OPEN DATABASE 参考答案:D 答案解析:[知识点] Visual FoxPro数据库的基本操作 [评析] 打开数据库的命令是OPEN DATABASE 语法: OPEN DATABASE [FileName|] [E