58._________A. andB. soC. howeverD. therefore

__________ 查看材料A.andB.butC.orD.than

59._________A. thereforeB. moreoverC. howeverD. w

62._________A. whenB. yetC. howeverD. while

53._________A. andB. butC. yetD. unless

_________（47）A.Therefore strict measures must be

_________（48）A.Therefore strict measures must be