【单选题】166XLGLX.()的尺寸对最大轨缝限制值(即构造轨缝)没有影响。
【多选题】建筑企业材料储备定额的作用具体表现在()。
A.
它是企业编制材料供应计划、安排订购批量和进料时间的依据之一
B.
它是掌握和监督库存动态,使库存经常保持在合理水平的标准
【单选题】下列关于休止角的正确表述为( )
C.
休止角小于40°时物料的流动性可以满足生产的需要
【单选题】()是企业依据自身的实际-隋况制定企业机构的设置和配备各类人员的数量界限。
【单选题】His heart racing, and tears ____ his eyes, Jack carefully unlocked the box.
【单选题】在蒸气冷凝传热中,不凝气体的存在对a的影响是( )
【单选题】Father hoped ________ horse riding when we were in Inner Mongolia. [ ]
【单选题】在蒸气冷凝传热中,不凝性气体的存在会使冷凝传热速率大大降低,这是因为
A.
不凝性气体掺杂在蒸气中,导致蒸气的导热热阻大大增加
B.
不凝性气体掺杂在蒸气中,导致蒸气的对热热阻大大增加
C.
传热壁面附近被不凝性气体遮盖,增加了一层附加的气体导热热阻
D.
传热壁面附近被不凝性气体遮盖,使得冷凝液液膜变厚
【单选题】Ali decides to attend the one hour review session for microeconomics instead of working at his job. His job pays him $10 per hour. Aliʹs opportunity cost of attending the review session is
A.
the $10 he could have earned at his job.
B.
the value of the session minus the $10 he could have earned at his job.
C.
nothing, because the review session does not cost anything.
D.
equal to the benefit he gets from the review session.
E.
the one-hour review session.