强度等级为7.5的轻集料混凝土小型空心砌块,其抗压强度最小值为()。
A.≥2.0Mpa
B.≥2.8Mpa
C.≥4.0Mpa
D.≥6.0Mpa
参考答案:D
If you are feeling so tired, perhaps a little sleep would _____. [ ]
A. act
B. help
C. serve
D. last
患者,男性,61岁。因胸闷、胸痛2小时入院。听诊双肺广泛湿性啰音,心音低钝,心电图V1~V5导联ST段抬高,TnI升高,对诊断最有意义的是()
A.冠状动脉CTA(16排螺旋CT)
B.监测心电图变化
C.冠状动脉造影术
D.动态心电图
E.心脏超声