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问题 单项选择题

社会主义初级阶段坚持按劳分配为主体、多种分配方式并存的制度必须体现( )。

A．以按劳分配为主体，多种分配方式并存的原则

B．多劳多得，少劳少得，不劳不得的原则

C．效率优先兼顾公平原则

D．“先富后富，共同富裕”的原则

答案

参考答案：C

单项选择题

What is meant by the term “radio silence”?（）

A.Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel

B.Stations remaining off the air to safeguard proprietary information

C.Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting "window" for distressed vessels to transmit distress alerts using J3E

D.Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic
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单项选择题

用于最后孤立磨牙、且向近中舌侧或近中颊侧倾斜牙上的卡环是

A．三臂卡环
B．圈形卡环
C．对半卡环
D．回力卡环
E．联合卡环
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