三、判断题 1.√ 2.√ 3.√ 4.√ 5.√ 6.× 7.√ 8.√ 9.× 10.√ 11.√ 12.× 13.√ 14.√ 15.√ 16.√ 17.√ 18.× 19.√ 20.× 21.× 22.× 23.√ 24.× 25.× 26.× 27.√ 28.× 29.× 30.× 31.× 32.√ 33.× 34.× 35.× 36.√ 37.× 38.× 39.√ 40( )