EXERCISE 1 1
EXERCISE 2 5
EXERCISE 3 8
EXERCISE 4 15
EXERCISE 5 22
EXERCISE 6 25
EXERCISE 7 29
EXERCISE 8 32
EXERCISE 9 35
EXERCISE 10 37
EXERCISE 11 43
EXERCISE 12 46
EXERCISE 13 49
EXERCISE 14 61
EXERCISE 15，16，17 68
EXERCISE 18 74
EXERCISE 19 76
EXERCISE 20 82
EXERCISE 21 86
EXERCISE 22 90
EXERCISE 23，24 104
EXERCISE 25 110
EXERCISE 26 113
EXERCISE 27 119
EXERCISE 28 121
EXERCISE 29 123
EXERCISE 30 126
EXERCISE 31 137
EXERCISE 32 141
EXERCISE 33 143
EXERCISE 34 168
EXERCISE 35 172
EXERCISE 36 184
EXERCISE 37 192
EXERCISE 38 204
EXERCISE 39 210
EXERCISE 40 219
EXERCISE 41 230
EXERCISE 42 232
EXERCISE 43 236
EXERCISE 44 240
EXERCISE 45 244
EXERCISE 46 247
EXERCISE 47 249
EXERCISE 48 252
EXERCISE 49 255
EXERCISE 50 260
EXERCISE 51 262
EXERCISE 52 266
EXERCISE 53，54 269
EXERCISE 55 271
EXERCISE 56 275
EXERCISE 57 288
EXERCISE 58 290
EXERCISE 59 293
EXERCISE 60 296
EXERCISE 61 298
EXERCISE 62 302
EXERCISE 63 317
EXERCISE 64 321
EXERCISE 65 324
EXERCISE 66 330
EXERCISE 67 335
EXERCISE 68 337
EXERCISE 69 346
EXERCISE 70 355