下列物质中,能降低血红蛋白输氧功能的是 [ ]
A. CO
B. CO2
C. H2
D. N2
答案:A
Think and judge. 检查下面算式算的是(√)否(×)正确。
1. eight + nine = sixteen ( ) 2. four + six > ten ( )
3. seven + four < twelve ( ) 4. ten + five = fifteen ( )
5. twenty - eleven = nine ( )
心电图对右心室肥大的诊断较左心室肥大敏感。()