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This question is not ______ that one.

A. so difficult than
B. so difficult as
C. as difficult than

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Which of the following costs of consignment are fixed? ()

A. costs of documentation
B. costs of insurance
C. costs of customs clearance
D. costs of shipment

需要系数法尤其适用配、变电所的负荷计算。()

A. 正确
B. 错误

一般认为,凡遗传度高于()的心理疾病就可认为有遗传倾向。

A. 60%
B. 70%
C. 80%

40岁,月经周期7~10d/20~40d,量多,基础体温单相,宫颈粘液结晶呈现持续雌激素高度影响,此时子宫内膜的改变为

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