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问题 单项选择题

食物中蛋白质生物价值的高低主要取决于

A．食物的消化吸收率
B．食物中必需氨基酸的含量和比值
C．食物中蛋白质的绝对含量
D．食物中氨基酸含量
E．以上都不是

答案

参考答案：B

单项选择题

肠道的正常菌群不包括

A．大肠埃希菌
B．类杆菌
C．小肠结肠炎耶尔森菌
D．双歧杆菌
E．变形杆菌
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问答题

(A) 条件(1)充分，但条件(2)不充分．
(B) 条件(2)充分，但条件(1)不充分．
(C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
(D) 条件(1)充分，条件(2)也充分．
(E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

A certain car dealership has two locations. Last month, an average (arithmetic mean) of 11 cars per salesperson was sold at location A and an average of 16 cars per salesperson was sold at location B. What was the average number of cars sold per salesperson at this dealership last month
(1) Last month, the number of salespeople at location A was 3 times the number of salespeople at location B.
(2) Last month, the total number of cars sold at location A was 132, and the total number of cars sold at location B was 64.
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