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Áù¼¶´Ê»ãͬ²½Ñ§Á·²â Exercises /1 Exercise 01 2 Exercise 02 6 Exercise 03 10 Exercise 04 14 Exercise 05 18 Exercise 06 22 Exercise 07 26 Exercise 08 30 Exercise 09 34 Exercise 10 38 Exercise 11 42 Exercise 12 46 Exercise 13 50 Exercise 14 54 Exercise 15 58 Exercise 16 62 Exercise 17 66 Exercise 18 70 Exercise 19 74 Exercise 20 78 Exercise 21 82 Exercise 22 86 Exercise 23 90 Exercise 24 94 Exercise 25 98 Exercise 26 102 Exercise 27 106 Exercise 28 110 Exercise 29 114 Exercise 30 118 ͬ²½Ñ§Á·²â´ð°¸ Answers /123 Answer 01 124 Answer 02 125 Answer 03 127 Answer 04 128 Answer 05 130 Answer 06 131 Answer 07 133 Answer 08 134 Answer 09 136 Answer 10 137 Answer 11 139 Answer 12 140 Answer 13 142 Answer 14 143 Answer 15 145 Answer 16 146 Answer 17 148 Answer 18 149 Answer 19 151 Answer 20 152 Answer 21 154 Answer 22 155 Answer 23 157 Answer 24 158 Answer 25 160 Answer 26 161 Answer 27 163 Answer 28 164 Answer 29 166 Answer 30 167