结507焊条，第三位数字“7”表示药皮类型为（）。
A、钛钙型
B、酸性
C、碱性
D、低氢型
参考答案：D
请运用我国基本经济制度有关知识以及法律方面的知识，对下面两种观点进行辨析。
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When preparing a client for a scheduled colonoscopy, which of the following nursing interventions would the nurse include（）
A. Inserting a nasogastric tube 12 hours before the procedure.
B. Cleansing the bowel with laxatives or enemas.
C. Administering an antibiotic to decrease the risk of infection.
D. Spraying a local anesthetic into the client’s throat to calm the gag reflex.
