标注尺寸时，首先应（     ）
A、标注定形尺寸
B、标注定位尺寸
C、确定尺寸基准
D、标注总体尺寸

多项选择题下列问题的答语可以包括哪些内容？ How do you think you can achieve your goal? A、I will try my best to cooperate with my team-members and gain as much work experience as I could. B、 I will set some short–term goals and then devote myself to realize them one by one. C、I haven't really thought about it. D、I will read more books to enrich my professional knowledge.

不定项选择‌持久性有机污染物不会分解‏