6kV厂用正常切换中，手动并联半自动切换的过程是怎样的？

初一（2）班共有学生44人，其中男生有30人，女生14人，若在此班上任意找一名学生，找到男生的可能性比找到女生的可能性______ （填“大”或“小”）．

Mr. Smith would have come to see you if it had been possible, but he _______ so busy.[ ]

A. was

B. had been

C. has been

D. were

How much ______ these new pants? [ ]

A. is

B. are

C. have

D. has

商品的质量是指商品满足规定或潜在要求或需求的特征和特性的总和，是商品学研究商品使用价值的核心内容。（）