Freight rates are mostly charged().
A. by the weight (tons) of cargo
B. by the capacity (tons) of vessel
C. by DW of the vessel
D. by the draft of the vessel
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踝关节注射的禁忌证不包括()
A. 创伤后踝关节病变
B. 踝部皮肤感染或伤口
C. 踝关节化脓性、结核性、血友病关节炎
D. 踝部骨肿瘤
E. 体弱或肝肾功能不全者
隔爆性能必须符合()的要求。
A. 防爆标准
B. 完好标准
C. 检修
D. 安全规程
不需要应用托槽的矫治器是()
A. BeggAppliance
B. EdgewiseAppliance
C. StraighwiseAppliance
D. Invisalign
E. Lingualappliance