下列哪种激素能使血糖降低？（） ["肾上腺素与去甲肾上腺素","甲状腺素","糖皮质激素","胰高血糖素","胰岛素"]
岩基内应力计算和岩基的沉降计算一般采用下面哪一种理论？（） ["弹性理论","塑性理论","弹塑性理论","弹塑粘性理论"]
ThinkPad560采用了真空管的设计.
小于13mm末煤产品带入稀介段的磁性物经验指标为（）kg/t。 ["20","30","40","50"]
血液正常pH值保持在（）。 ["5.35～6.45","6.35～7.45","7.35～7.45","7.35～8.45","8.35～8.45"]
海冰融化后，盐度会有何变化？
