较长的构件，如沿长度方向的形状相同或按一定规律变化，可用折断线断开省略绘制。（ ）

单项选择题确定于比赛之前，是根据己方技术水平、对手优缺点和比赛冰面条件等方面指定的。

单项选择题对亚声速流,可采用( )增速。 A、扩压管 B、喷管 C、渐缩管 D、渐扩管

单项选择题What is the main benefit for students to be Peer Assessors? A. They get extra points for their grade. B. It makes it easier to cheat. C. They learn how to make judgments using criteria. D. They get paid to do it. E. They learn how to use psychology questionnaires

单项选择题下列属于常绿开花乔木的是（）。A、二乔玉兰B、垂枝红千层C、火焰树D、蓝花楹

单项选择题Interpreters and commentators attempt to radically change their individual personality traits, physical characteristics, or voice qualities