胸膜腔镇痛的适应证不包括()
A．慢性胰腺疼痛
B．心绞痛
C．急性创伤后疼痛
D．手术后上腹部疼痛
E．手术后胸痛
参考答案：B
若NA为阿伏加德罗常数的值，下列说法不正确的是（ ）
A．22 g乙醛中含有3 NA个键
B．lmol C12与足量Fe完全反应，反应中转移3 N A个电子
C．对于Si+O2SiO2，每当形成2 NA个Si－O键，需断开NA个Si--Si键
D．氯元素的某种核素的质量为ag，该核素的摩尔质量为aNAg/mol
________, Mr. Smith managed to send his daughter to school.
A．As he was a poor man
B．A poor man as he was
C．Poor man as was he
D．Poor man as he was
键
SiO2，每当形成2 NA个Si－O键，需断开NA个Si--Si键