数据的存储结构主要由____和____两种基本方法,不论哪种存储结构,都要存储两方面的内容:____和____。
某边长丈量若干次,计算得到平均长为200m,平均值的中误差为0.05m,则该边长的相对误差为( )。
A. 0.25%
B. 0.025
C. 1/8000
D. 1/4000
在相同的观测条件下测得同一水平角角值为:173°58′58"、173°59′02"、173°59′04"、173°59′06"、173°59′10",则观测值的中误差为()。
A. ±6.3"
B. ±5.6"
C. ±4.5"
D. ±4.0"
E. 0
F. 2
[音频]Listen and complete a conversation between an architect and her client.Architect: Keystone Architecture. This is Donna.Client: Hi, Donna, it’s Jim North. I’m calling about the 1 ______________ that you sent me.Architect: Is there a problem?Client: Well, I’m wondering, why do we need the 2 ______________ on the ceilings?Architect: Oh, vaulted ceilings create more 3 ______________ .Client: So they make rooms look 4 ______________ ?Architect: Yes, exactly. The only downside is that they can 5 ______________ energy costs.Client: In that case, I’d rather go with flat ceilings so we’re not 6 ______________ energy.