A. Usingtoomanyvisualeffects. B. Usingatleastfontsize24sothatyouraudiencecanseeclearly. C. Rememberingthe6x7rule. D. Neverusingirrelevantpictures.
A. Usingcontrastingcolorslikelightondarkordarkonlight. B. Usingallcapitalletters. C. Usingold-stylehandwritingfonts. D. Usingitalicsorunderlineseverywhere.
A. 对 B. 错
A. 0.8-1.8% B. 0.8-2.8% C. 1.8-2.8% D. 2.8-4.8%
A. 是Fe-Si合金 B. [1 0 0]晶向最易磁化 C. 体心立方晶格 D. 硅含量越高越好