By ___ computation, he estimated that the repairs o the house would cost him a thousand dollars. A.coarseB.rudeC.crudeD.rough
By ___ computation, he estimated that the repairs o the house would cost him a thousand dollars.
A.coarse
B.rude
C.crude
D.rough
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快速数字转换（英到中）： 1 thousand, 10 thousand, 100 thousand, 1 million, 10 million, 100 million, 1 billion, 10 billion, 100 billion, 1 trillion
10、下列各组分子或离子中，均呈顺磁性的是（)A．B2、O22-B．He2+、B2C．N22+、O2D．He2+、F2