【单选题】某剪力墙上标有JD2 400 х 300 +3.1000 3 φ 14 . 表示此墙上开有洞口,洞口( ) 补强钢筋为3φ14
【单选题】某剪力墙上标有JD2 400х300 +3.1000 3 14. 表示此墙上开有洞口,洞口( )距本结构层楼面3100mm.
【单选题】提高农产品质量、增强竞争力、保证消费安全、走向世界的基础是()。
【单选题】某剪力墙上标有 JD2 400х300 +3.1000 表示此墙上开有洞口 , 洞口 ( ) 补强钢筋为 3B14
【单选题】某剪力墙上标有 JD2 400х300 +3.1000 表示此墙上开有洞口 ,洞口 ( ) 距本结构层楼面 3100mm.
【判断题】Many small firms prefer the proprietorship while large companies prefer the corporation.
【单选题】Which of the following statements is NOT characteristic of perfect competition?
A.
. All firms produce the same standardized product.
B.
. There are many producers, and each has only a small market share.
C.
. There are many producers; one firm has a 25% market share, and all of the remaining firms have a market share of less than 2% each.
D.
. There are no obstacles to entry into or exit from the industry.
【简答题】农产品质量安全是__________、优质、营养等要素的综合体。
【单选题】()是经济建设和改革开放取得成功的根本保证