3.下列判断不正确的是( )
0 294204 294212 294218 294222 294228 294230 294234 294240 294242 294248 294254 294258 294260 294264 294270 294272 294278 294282 294284 294288 294290 294294 294296 294298 294299 294300 294302 294303 294304 294306 294308 294312 294314 294318 294320 294324 294330 294332 294338 294342 294344 294348 294354 294360 294362 294368 294372 294374 294380 294384 294390 294398 366461
| A. | 如果$\overrightarrow{AB}$=$\overrightarrow{CD}$,那么|$\overrightarrow{AB}$|=|$\overrightarrow{CD}$| | B. | $\overrightarrow{a}$+$\overrightarrow{b}$=$\overrightarrow{b}$+$\overrightarrow{a}$ | ||
| C. | 如果非零向量$\overrightarrow{a}$=k•$\overrightarrow{b}$(k≠0),那么$\overrightarrow{a}$∥$\overrightarrow{b}$ | D. | $\overrightarrow{AB}$+$\overrightarrow{BA}$=0 |