以（）方法阻碍烟草专卖执法人员依法执行职务，构成犯罪的，以妨害公务罪追究刑事责任。
A.暴力
B.暴力、威胁等
C.各种
D.非暴力
参考答案：B
Two thirds of the subway construction________so far and people will enjoy a fast and convenient
trip under the city early next year.[ ]
A. have been completed
B. is being completed
C. has been completed
D. will be completed
应在系统的( )布置净化有爆炸危险粉尘作用的干式除尘器或过滤器。
A．负压段 B．正压段C．既非正压段也非负压段 D．既是正压段也是负压段
