题目内容

At present the number of bone marrow donors in mainland China is___________

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A. victimsB. participantsC. researchersD. partner

A. victims
B. participants
C. researchers
D. partner

In the passage how many cancers are mentioned in relation to smoking cigars Aaily？

A. Six.
B. Seven.
C. Eight.
D. Nine.

Routine X-ray chest examination is not so dangerous___________

In the last sentence of the second paragraph, "another" means__________

A. another routine
B. another shift
C. another week
D. another person