心脏停搏早期的主要诊断依据是()。
A.发绀
B.瞳孔散大
C.大动脉搏动和神志消失
D.脑电波消失
E.心电图呈室颤
参考答案:C
完成句子
1. I don't know what he's doing.___(我也不关心).
2. He___(不可能去)to Beijing last night.I saw him just now.
3.____(毫无疑问) that he will win the match.
4. She insisted that she___(不需要帮助).
5. Though the experiment wasn't very successful, we ___(高度评价)his work in the experiment.
某一施工现场需要填土,其坑的体积为20×20×5=2000m3,土方的来源是从附近土丘开挖。经勘察,该土的相对密度ds=2.70,含水量ω=15%,孔隙比e=0.60。要求填土的质量是含水量ω=17%,干重度γd=17.6kN/m3。
④碾压后,填土的孔隙比是()。
A.0.534
B.0.579
C.0.612
D.0.635