质感
心肌收缩能力
Which statements are true regarding ISDN channels?（） [" Each B channel can transmit up to 64 kbps"," The ISDN B channel carries voice or data"," The ISDN D channel transmits control information."," The D channel transmission rate varies depending on the service used."," HDLC or PPP can be used to encapsulate D channel information."]
“黑五类”是指，现实空间里正面形成的警察、公务员、城管、教师、党员，在网络空间里变成了被攻击的弱势群体，这是网络文化不正常的一种体现。
控制活动是指企业根据风险评估结果，采用相应的控制措施，将风险控制在可承受度之内。企业控制活动包括（）。 ["账簿控制活动","实物控制活动","程序控制活动","牵制控制活动"]
主点
