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【单选题】
某物资库存系统中的安全库存量为20件,需求量的期望值为100件/月,单位货物每月的储存0.5元/件×月,提前订货期的期望值为6天,每次订货100元,则其最佳订货批量、最小库存总费用和订货点为( )。
A.
200110520
B.
400,110,40
C.
1200,100,40
D.
200110
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【简答题】When you take a taxi, you must ask for a ________(收据)
【单选题】高分化鳞癌中最典型的特征是
A.
细胞核分裂象少
B.
形成癌巢
C.
出现角化珠
D.
网状纤维围绕癌巢
E.
实质与间质分界清楚
【单选题】强度级别为MU10、外观质量为一等品的混凝土多孔砖,其标记为( )。
A.
CPC MU10 B JC943;B、CPB MU10 B JC943-2004;
B.
CPC MU10 C JC943;D、CPB MU10 C JC943-2004。
【单选题】The old man is quite weak after the accident, so he _____ . [     ]
A.
must take care of
B.
must be take care of
C.
must look after
D.
must be looked after
【单选题】世界上最早提出“启发诱导” 教育思想的教育家是( )。
A.
苏格拉 底
B.
孔子
C.
孟子
D.
荀子
【单选题】Which of the following best summarizes the text?
A.
As the UN hesitates, the poor take action.
B.
Progress in environmental protection has been made since the Rio Summit.
C.
Climate changes can no longer be neglected.
D.
The decline of earth's life-support systems has been halted.
【单选题】强度级别为MU10、外观质量为一等品的混凝土多孔砖,其标记为()
A.
CPC MU10 BJ C943
B.
CPB MU10 BJ C943-2004
C.
CPC MU10 CJ C943
D.
CPB MU10 CJ C943-2004
【单选题】当心室舒张时,那组瓣膜关闭
A.
二尖瓣和三尖瓣
B.
肺动脉瓣和二尖瓣
C.
主动脉瓣和二尖瓣
D.
肺动脉瓣和三尖瓣
E.
主动脉瓣和肺动脉瓣
【单选题】The old man was quite weak after the accident. So he _____. [     ]
A.
must be take care of
B.
must take care of
C.
must be looked after
D.
must look after
【单选题】---Must I take this medicine, Mom? It ________ so terrible. ---Yes, you must take it for another three days.
A.
is tasting
B.
is tasted
C.
tastes
D.
has tasted
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