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计算题：用剪床剪切厚度为8mm，宽度为1000mm的20#钢钢板，设钢板的强度δb=420N/mm×mm，刃剪床与斜刃剪床（斜角β=2°30’）上所需要的剪力？
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举一反三
【多选题】Which of the following is one of the types of standard?
A.
Basic
B.
Ideal
C.
Attainable
D.
Efficient
【单选题】One of the types of cost estimation is Order of Magnitude This estimate
A.
Is performed when detailed information is available
B.
Is performed when little if any information is available
C.
Is used in the beginning of the project conceptualization
D.
B and C
【单选题】测定总硬度时,吸取水样100ml,以铬黑T指示剂,调pH=10,用0.0100mol•L-1标准EDTA溶液滴定,用去3.00ml。则水样的总硬度为( )。 (以CaCO 3 计,CaCO3摩尔质量100.1g/mol)
A.
3.00 mg/L
B.
30.03mg/L
C.
300.30 mg/L
D.
0.30 mg/L
【单选题】Which of the following is NOT one of the types of context
A.
Linguistic context.
B.
Non-linguistic context.
C.
Extra-linguistic context.
D.
Intra-linguistic context.
【简答题】A non-vessel operating common carrier is one of the types of liner service．（ ）
【单选题】测定总硬度时,吸取水样 100ml ,以铬黑 T 指示剂,调 pH = 10 ,用 0.0100mol · L -1 标准 EDTA 溶液滴定,用去 3.00ml 。则水样的总硬度为:( ) (以 CaCO 3 计, CaCO 3 摩尔质量 100.1g/mol )
A.
A 3.00 mg/L
B.
B 30.03mg/L
C.
C 300.30 mg/L
D.
D 0.30 mg/L
【单选题】Which of the following is one of the types of corporate strategies?
A.
Horizontal integration
B.
Diversification
C.
Stability
D.
Operational
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