OPEN HEART SURGERY HAS BEEN POSSIBLE ____________________.A. ONLY...

Question

63. Open heart surgery has been possible ____________________.A. only in the last sixty years B. from prehistoricC. since the nineteenth century D. since the invention of valves

Answer

63. Open heart surgery has been possible ____________________.A. only in the last sixty years B. from prehistoricC. since the nineteenth century D. since the invention of valves

OPEN HEART SURGERY HAS BEEN POSSIBLE ____________________.A. ONLY...

63. Open heart surgery has been possible ____________________.

A. only in the last sixty years B. from prehistoric

C. since the nineteenth century D. since the invention of valves

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