在芍药汤中体现"行血则便脓自愈，调气则后重自除"之理的药对是（）
A. 芍药、甘草
B. 槟榔、木香
C. 当归、木香
D. 大黄、官桂
E. 当归、大黄
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胎儿肠道是无菌的，生后数小时细菌侵入肠道，主要分布在____和____。
正常肝脏CT值高于脾脏，所以肝脏肿瘤密度也比脾脏肿瘤密度高。（）
A. 正确
B. 错误
Which two statements are true about voice ports on a router？ （）
A. Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports.
B. Calls to the PSTN can be made via FXS or T1/E1 trunk ports.
C. Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk ports.
D. Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers.
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