9.下列单项式中,与a2b是同类项的是( )
| A. | 2a2b | B. | a2b2 | C. | ab2 | D. | 3ab |
8.如果a与3互为倒数,那么a是( )
0 284179 284187 284193 284197 284203 284205 284209 284215 284217 284223 284229 284233 284235 284239 284245 284247 284253 284257 284259 284263 284265 284269 284271 284273 284274 284275 284277 284278 284279 284281 284283 284287 284289 284293 284295 284299 284305 284307 284313 284317 284319 284323 284329 284335 284337 284343 284347 284349 284355 284359 284365 284373 366461
| A. | -3 | B. | 3 | C. | -$\frac{1}{3}$ | D. | $\frac{1}{3}$ |