There is an _______ of possibilities in cancer researches.
举一反三
- The purpose of the author in mentioning the three researches is to ______. A: make a contrastive analysis of them B: illustrate the achievements in cancer therapy C: present the similarities and differences between them D: show how altered genes can cause cancer
- Production efficiency occurs when production ( ). A: is at a point beyond the production possibilities frontie B: is on the production possibilities frontier or inside it C: is at any attainable point D: is on the production possibilities frontie
- HeLa is a _____________ cell line A: Breast cancer B: Thyroid cancer C: Cervical cancer D: Prostate cancer
- Paragraph 1（） A: How is cancer treated B: Does cancer always cause pain C: Can cancer be prevented D: What is cancer E: How common is cancer F: What causes cancer
- 要检索期刊“cancer”被PubMed收录的文献,可采用的检索式 ( ) A: "cancer" [ti] B: "cancer" [ta] C: "cancer" [tw] D: "cancer" [pt] E: "cancer" [jt]