《煤矿安全规程》规定：入井人员必须戴安全帽、随身携带（）和矿灯，严禁携带烟草和点火物品，严禁穿化纤衣服，入井前严禁喝酒。
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通常生理学的研究方法分为三个水平，即（）、（）和（）。
You are a network administrator of a large investor relations company that uses a switchednetwork to carry both data and IP telephony services. Why should you carry voice traffic on aseparate VLAN？（）
A. IP phones require inline power and must be in separate VLAN to receive inline power
B. IP telephony applications require prioritization over other traffic as they are more delaysensitive
C. IP phones can only receive IP addresses through DHCP if they are in separate VLAN
D. The CDP frames from the IP phone can only be recognized by the switch if the phone is in anauxiliary vla
《西洲曲》抒写的是（）
A. 少女对情郎的无尽思恋
B. 游子对家乡的无尽思恋
C. 妻子对丈夫的无尽思念
D. 儿子对父母的无尽思念
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