69. How many positive integers can be expressed as a product of two or more of the prime number 5, 7, 11, and 13 if no one product is to include the same prime factor more than once?
A.Eight B.Nine C. Ten D.Eleven E.Twelve
70.In 1990 for which of the selected sciences did the greatest percent of its graduate students have research fellowships?
A.Biology B. Chemistry C. Computer science D. Engineering E. Physics
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