[单选题]变更工作负责人或增加工作任务,如工作票签发人无法当面办理,应(),并在工作票登记簿和工作票上注明。
A.经工作许可人同意
B.经调度值班员同意
C.通过电话联系
D.经运行值班负责人同意

Passage 3
Today, cigarette smoking is a common habit. About forty-three percent of the adult men and thirty-one percent of the adult women in the United States smoke cigarettes regularly. It is encouraging to see that millions of people have given up smoking.
It is a fact that men as a group smoke more than women. Among both men and women the age group with the highest proportion of smokers is 24～44.
Income, education, and occupation all play a part in determining a person’s smoking habit. City people smoke more than people living on farms. Well-educated men with high incomes are less likely to smoke cigarettes than men with fewer years of schooling and lower incomes. On the other hand, if a well-educated man with a higher income smoked at all, he is likely to smoke more packs of cigarettes per day.
The situation is somewhat different for women. (1) There are slightly more smokers among women with higher family income and higher education
A. The situation is quite the same for women as for men.
B. Better-educated women are likely to smoke heavily.
C. There are more women smokers with low incomes.
D. Women with higher incomes and higher education do not tend to smoke.