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【单选题】
Number of engineering hours is a likely cost driver for which value chain function?A.
a. The research and development function has number of engineering hours as a likely cost driver.
B.
b. The design function has number of engineering hours as a likely cost driver.
C.
c. The marketing function has number of engineering hours as a likely cost driver.
D.
d. The production function has number of engineering hours as a likely cost driver.
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【单选题】直线y=kx+1（k∈R）与椭圆 x 2 5 + y 2 m =1 恒有公共点，则m的取值范围是（ ）
A.
[1，5）∪（5，+∞）
B.
（0，5）
C.
[1，+∞）
D.
（1，5）
【多选题】HPLC的特点包括()
A.
Widely available
B.
Relatively easy to use
C.
High accuracy and precision
D.
Extended analytical time
E.
Relatively high cost
【单选题】Which of the following are primary concerns of the bank manager?
A.
maintaining sufficient reserves to minimize the cost to the bank of deposit outflows
B.
extending loans to borrowers who will pay low interest rates, but who are poor credit risks
C.
acquiring funds at a relatively high cost, so that profitable lending opportunities can be realized
D.
maintaining high levels of capital and thus maximizing the returns to the owners
【单选题】不论k为何值，直线y=kx+1与椭圆 x 2 7 + y 2 m =1有公共点，则实数m的范围是（ ）
A.
（0，1）
B.
[1，+∞）
C.
[1，7）∪（7，+∞）
D.
（0，7）
相关题目：
【单选题】直线y=kx+1（k∈R）与椭圆 x 2 5 + y 2 m =1 恒有公共点，则m的取值范围是（ ）
A.
[1，5）∪（5，+∞）
B.
（0，5）
C.
[1，+∞）
D.
（1，5）
参考解析：
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