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[单选题]
某井中有密度为1.40g£¯cm3的钻井液210m3,储备钻井液的密度为1.80g£¯cm3,欲将井内钻井液密度提高到1.50g£¯cm3,需要加入()m3储备钻井液。
A.40
B.50
C.60
D.70
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.40
B.50
C.60
D.70
A.1MPa
B.2MPa
C.3MPa
D.4MPa
A.1 MPa
B.2 MPa
C.3 MPa
D.4 MPa
A.1.50
B.1.47
C.1.40
D.1.30
密度梯度管测得某对苯二甲酸乙二酯试样的密度为ρ=1.40g/cm3,试计算其质量结晶度和体积结晶度
。
A.12.68t
B.10.68t
C.16.95t
D.17.95t
A.40
B.50
C.60
D.70
A.1.36
B.1.37
C.1.38
D.1.50
A.1.36 g/cm3
B.1.34 g/cm3
C.1.32 g/cm3
D.1.50 g/cm3