【单选题】What does “ self-made ” mean in the first paragraph ?
B.
become successful and rich through their own efforts
【单选题】Osmium has a density of 22.6 g/cm3. The mass of a block of osmium that measures 1.01 cm × 0.233 cm × 0.648 cm is __________ g.
【判断题】线束是非开模件,柔性件,可塑性高。实际装车状态会与3D数模差距很大。
【单选题】以下关于健康的说法,您认为正确的是()
D.
健康不仅仅是没有疾病或虚弱,而是身体、心理和社会适应的完好状态。