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- A.Na=0
- B.Na=P/2
- C.Na=P
- D.Na=3P/2
- A.2
- B.4
- C.6
- D.8
- A. <img src="//img1.yqda.net/question-name/d4/9653f5da8c30949bda824a21d074fa.png" width="177" height="44"/>
- B. <img src="//img1.yqda.net/question-name/5d/877c2063a5336425993a227b17d930.png" width="175" height="44"/>
- C. <img src="//img1.yqda.net/question-name/aa/21f9c6d76c0f40b2ab9b32f7a87a72.png" width="189" height="25"/>
- D. <img src="//img1.yqda.net/question-name/1a/a1b59bcd4598c4a1b1acf4b10354cc.png" width="189" height="25"/>
- A.P3=2
- B.P3=-2
- C.P3=2√2/3
- D.P3=-2√2/3
- A.3/4
- B.5/4
- C.3/5
- D.4/5
- A. <img src="//img1.yqda.net/question-name/4b/e3fb6473a0ba022b9e04010013aa1d.png" width="129" height="45"/>
- B. <img src="//img1.yqda.net/question-name/90/5b964a84a8e27cdd29796708c8f505.png" width="144" height="45"/>
- C. <img src="//img1.yqda.net/question-name/18/de36a5928d0ed85e8fbbfb1d4e454d.png" width="148" height="45"/>
- D. <img src="//img1.yqda.net/question-name/17/82754e572527d1aeb55b2e3932ca76.png" width="125" height="45"/>
- A.ql2/8h
- B.ql2/4h
- C.ql2/12h
- D.ql2/16h
- A.压力√2P
- B.拉力√2P
- C.压力√2/2P
- D.拉力√2/2P
- A.1/6qa
- B.1/2qa
- C.qa
- D.2qa
- A. <img src="//img1.yqda.net/question-name/30/6be0d19cc25dc9a020d1b2781ca195.png" width="99" height="88"/>
- B. <img src="//img1.yqda.net/question-name/6e/c906428daf9179a812ff29362e32ec.png" width="89" height="82"/>
- C. <img src="//img1.yqda.net/question-name/1b/e0ce65d9d6134d1a302354c62798bb.png" width="98" height="76"/>
- D. <img src="//img1.yqda.net/question-name/46/7bdd66c0c76ca1dcf3eba355c2fd9d.png" width="98" height="76"/>
