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【单选题】
已知 i 是虚数单位,则(3+i)/(1-i) =( ) A . 1 - 2i B . 2 - i C . 2 + i D . 1 + 2i
A.
． 1 － 2i
B.
． 2 － i
C.
． 2 ＋ i
D.
． 1 ＋ 2i
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A.
B.
-
C.
2
D.
-2
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【简答题】If there are only red, blue, and green marbles in a jar, what is the ratio of red to blue marbles? (1) The ratio of red to green marbles is 2:3. (2) The ratio of green to blue marbles is 6:5.
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【单选题】The ratio of 2 quantifies is 5 to 6. If each of the quantities is increased by 15, what is the ratio of these two new quantifies?
A.
5:6
B.
25:27
C.
15:16
D.
20:21
E.
It cannot be determined from the information given.
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【单选题】Magenta Ltd has a current ratio of 1.5, a quick ratio of 0.4 and a positive cash balance. If it purchases inventory on credit, what isthe effect on these ratios?
A.
Current ratio decrease and Quick ratio decrease
B.
Current ratio decrease and Quick ratio increase
C.
Current ratio increase and Quick ratio decrease
D.
Current ratio increase and Quick ratio increase
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【多选题】老年人养老照护模式有哪些？
A.
家庭养老
B.
机构养老
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社区养老
D.
以房养老
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【单选题】变压器负载( φ 2 >0 ° )增加时,从理论上讲,其主磁通( )。
A.
稍增大
B.
稍减小
C.
增大很多
D.
减小很多
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【简答题】What is the duty ratio? How to calculate the duty ratio?
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【简答题】What is the ratio of bronze to gold medals earned by Italy and France combined?
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【单选题】What is the correct definition of nozzle area expansion ratio?
A.
The ratio of nozzle exit area to the throat area
B.
The ratio of the nozzle area at the inflection point to the throat area
C.
The ratio of throat area to the nozzle inlet area
D.
The ratio of throat area to the area at the point of inflection
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【单选题】If a square and an equilateral triangle have equal perimeters, what is the ratio of the area of the triangle to the area of the square?
A.
B.
C.
D.
E.
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【单选题】设区域D由曲线 围成,则
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【简答题】If there are only red, blue, and green marbles in a jar, what is the ratio of red to blue marbles? (1) The ratio of red to green marbles is 2:3. (2) The ratio of green to blue marbles is 6:5.
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【单选题】The ratio of 2 quantifies is 5 to 6. If each of the quantities is increased by 15, what is the ratio of these two new quantifies?
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【单选题】Magenta Ltd has a current ratio of 1.5, a quick ratio of 0.4 and a positive cash balance. If it purchases inventory on credit, what isthe effect on these ratios?
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【简答题】What is the ratio of bronze to gold medals earned by Italy and France combined?
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【单选题】What is the correct definition of nozzle area expansion ratio?
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The ratio of nozzle exit area to the throat area
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The ratio of throat area to the area at the point of inflection
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【单选题】If a square and an equilateral triangle have equal perimeters, what is the ratio of the area of the triangle to the area of the square?
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