【单选题】由合力投影定理知:合力在任意轴上的投影,等于各分力在同一轴上投影的()。
【简答题】Unit 2 Homework 1. 强烈求生欲望之下,我想起了在救生课上所学到的知识。 2. 虽已疲倦不堪,但展望大海,感觉海水比任何时候看起来都更美。(as引导让步状语从句) 3. 因为恐惧我全身无力,但我强迫自己往前走去进行突发的求援。(be paralyzed with; impromptu rescue) 4. 我不仅从海里成功爬上防波堤的磐石,而且完成了自我救赎,摆脱了困扰已久的恐惧。...
【单选题】What did Claudia and Sun-hee do when Tara asks for an opinion about her jacket?
A.
They told Tara the truth.
B.
They told Tara a white lie.
【简答题】Write the correct words to complete the story summary: agrees, asks, calls, height, looks, shows, thirties, wears Sun-hee makes plans to meet her cousin at the bus station. then her coworker ____1____...
【简答题】由合力投影定理知:合力在任意轴上的投影,等于各分力存同一轴上投影的( )。 A、和 B、代数和 C、矢量和 D、总和
【单选题】设 A , B , C 是三个随机事件,且 A , C 相互独立, B , C 相互独立,则 A ∪ B 与 C 相互独立的充分必要条件是()。
【判断题】Watch and decide True or False Video Track 1-5-4srt.wmv Sun-hee asks a woman for directions.