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【单选题】
在彩印 T 恤中 单版印刷是指一张版就可以完成的印刷吗?A.
是的
B.
不是
C.
不确定
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反馈参考答案：
举一反三
【简答题】A current-carrying gold wire has diameter 0.84 mm. The electric field in the wire is 0.49V/m. The current carried by the wire equals A. (The resistivity of gold is 【图片】) (Be accurate to two deci...
【单选题】The resistivity of a 1.0 m long wire is 1.72 × 10-8 Ωm and its cross sectional area is 2.0 × 10-6 m2. If the wire carries a current of 0.20 A, what is the voltage across the wire?
A.
17 mV
B.
0.90 mV
C.
1.7 mV
D.
90 mV
【简答题】贯通测量应遵循的原则是什么?
【单选题】The average resistivity of the bedrock in the core is most similar to the average resistivity of which of thefollowing till layers?
A.
Yellow till
B.
Gray till B
C.
Olive green and gray till
D.
Gray till C
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