我
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- A.<img src="//img1.yqda.net/question-name/b4/914c7bdababec1dbf86f9c1c2f2062.jpg" alt="" border="0" />
- B.<img src="//img1.yqda.net/question-name/d2/66f492e3e82443bd07bcaa8c70829e.jpg" alt="" border="0" />
- C.<img src="//img1.yqda.net/question-name/9d/d45a22b5ea21655b379040ab4e4588.jpg" alt="" border="0" />
- D.<img src="//img1.yqda.net/question-name/47/893463878694b4fd8f3a2612cb6697.jpg" alt="" border="0" />
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- A.<img src="//img1.yqda.net/question-name/b2/28246a0fa277ebb04d40c4926744e3.jpg" alt="" border="0" />
- B.<img src="//img1.yqda.net/question-name/23/503d639c83b29649d994ecf4462a13.jpg" alt="" border="0" />
- C.<img src="//img1.yqda.net/question-name/12/d1a3ab88be063b1b9c3934c8a65d03.jpg" alt="" border="0" />
- D.<img src="//img1.yqda.net/question-name/84/61ff8abfb98a80e8b3ff59c9dee150.jpg" alt="" border="0" />
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- A.<img src="//img1.yqda.net/question-name/4e/03ebcd9f217b212b126aa6140b6035.jpg" alt="" border="0" />
- B.<img src="//img1.yqda.net/question-name/34/fa9eb8d952d23f6616e880f3308be3.jpg" alt="" border="0" />
- C.<img src="//img1.yqda.net/question-name/c1/9b13623660a9c8bc3422b2d9919ecb.jpg" alt="" border="0" />
- D.<img src="//img1.yqda.net/question-name/11/29cbbb51f8d400c82e40d9755cf81e.jpg" alt="" border="0" />
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- A. 收敛于1
- B. 收敛于0
- C. 发散
- D. 收敛于1或0
- A. 47种
- B. 40种
- C. 131种
- D. 47×44×40种
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下列等式中错误的是（ ）
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- A.<img src="//img1.yqda.net/question-name/64/8e4eccec99505a3b7ef57264db4752.jpg" alt="" border="0" />
- B.<img src="//img1.yqda.net/question-name/da/3794178395958df92c1dce72c4d39a.jpg" alt="" border="0" />
- C.<img src="//img1.yqda.net/question-name/b9/f7cfb93706fd883c9e09e1fa1f9d4a.jpg" alt="" border="0" />
- D.<img src="//img1.yqda.net/question-name/03/0cc50fe8feaa7ea7cf7bfddb0becba.jpg" alt="" border="0" />
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- A. a=2，b=-2
- B. a=-2，b=2
- C. a=2，b=2
- D. a=-2．b=-2
