成人胸外每按压30次的时间为()
A: 15S~18S
B: 18S~20S
C: 18S~23S
A: 15S~18S
B: 18S~20S
C: 18S~23S
举一反三
- 下列程序段的执行结果为() A: S=3 B: S=18 C: S=6 D: S=9
- 下列纬线中,按由南向北排列顺序正确的是() A: 30°S、15°S、15°N、30°N B: 30°N、15°N、15°S、30°S C: 10°S、20°S、30°S、40°S D: 40°N、30°N、20°N、10°N
- 机械通气患者每次吸痰时间以( )为宜 A: 10 s B: 15 s C: 20 s D: 30 s E: 60 s
- 完形填空 11 morning, everyone. 12 Grace. Look(看)!This is a 13 . It's a nice pen. What 14 is it? 15 yellow and white. And 16 this in English?It's 17 . It's 18 jacket. That's a ruler. 19 ruler is 20 .16.A.how B.what's C.what A: how B: what's C: what
- 完形填空 11 morning, everyone. 12 Grace. Look(看)!This is a 13 . It's a nice pen. What 14 is it? 15 yellow and white. And 16 this in English?It's 17 . It's 18 jacket. That's a ruler. 19 ruler is 20 .19.A.An B.The C.A A: An B: The C: A