9.化简$\sqrt{2}$+($\sqrt{2}$-1)的结果是( )
0 282958 282966 282972 282976 282982 282984 282988 282994 282996 283002 283008 283012 283014 283018 283024 283026 283032 283036 283038 283042 283044 283048 283050 283052 283053 283054 283056 283057 283058 283060 283062 283066 283068 283072 283074 283078 283084 283086 283092 283096 283098 283102 283108 283114 283116 283122 283126 283128 283134 283138 283144 283152 366461
| A. | $2\sqrt{2}-1$ | B. | $2-\sqrt{2}$ | C. | $1-\sqrt{2}$ | D. | $2+\sqrt{2}$ |