课前提问 1 P153 t1 a b c d 2.P154T3T4 3.P155T10 4.P156T12T14 5.P156T13课前提问 1. P153 T1 a b c d 2. P154 T3 T4 3. P155 T10 4. P156 T12 T14 5. P156 T13