要害岗位或单独值班岗位人员班中睡觉，或做与工种无关的事情的（）三违行为。
A. 一般
B. 严重
It can be inferred from the passage that the "prevailing dogma"(line 14)held that
A. Jim Crow laws were passed to give legal status to well-established discriminatory practices in the South.
B. Jim Crow laws were passed to establish order and uniformity in the discriminatory practices of different southern states.
C. Jim Crow laws were passed to erase the social gains that Black people had achieved since Reconstruction.
D. the continuity of racial segregation in the South was disrupted by passage of Jim Crow laws.
E. the Jim Crow laws of the late nineteenth and early twentieth centuries were passed to reverse the effect of earlier Jim Crow laws.
Which of the following best describes the organization of the first paragraph？
A thesis is presented and supporting examples are provided.
B. Opposing views are presented, classified, and then reconciled.
C. A fact is stated, and an explanation is advanced and then refuted.
D. A theory is proposed, considered, and then amended.
E. An opinion is presented, qualified, and then reaffirmed.
Which of the following can be inferred from the passage about the Native American inhabitants of Ungava Bay？
A. They were almost all killed by the 1952 epidemic.
B. They were immunologically defenseless against measles.
C. They were the last native people to be struck by a virgin-soil epidemic.
D. They did not come into frequent contact with white Americans until the twentieth century.
E. They had been inoculated against measles.
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