已知<imgwidth="138"height="26"v:shapes="_x0000_i1327"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image398.png">,则<imgwidth="70"height="24"v:shapes="_x0000_i1328"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image400.png">为()
①
<imgwidth="96"height="26"v:shapes="_x0000_i1329"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image402.png">
②
<imgwidth="98"height="26"v:shapes="_x0000_i1330"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image404.png">
③
<imgwidth="126"height="26"v:shapes="_x0000_i1331"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image406.png">
④
<imgwidth="166"height="28"v:shapes="_x0000_i1332"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image408.png">