No ( )is used at the end of a title . A. period B.question mark C.exclamation mark D.comma B. question mark C.exclamation mark D.comma C. exclamation mark D.comma D. comma
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举一反三
【简答题】已知椭圆 C: x 2 a 2 + y 2 b 2 =1(a>b>0) 的右顶点A为抛物线y 2 =8x的焦点,上顶点为B,离心率为 3 2 (1)求椭圆C的方程; (2)过点 (0, 2 ) 且斜率为k的直线l与椭圆C相交于P,Q两点,若线段PQ的中点横坐标是 - 4 2 5 ,求直线l的方程.
A cycle of transactions that converts cash inflows to cash outflows, or vice versa.
B.
A cycle where there is receipt of funding from investors, those funds are used to generate returns from investments and operations, and then the funds are returned to investors.
C.
A cycle where a property is purchased that has long-term future benefits for the enterprise, which ultimately results in cash inflows, and then the property is disposed of.
D.
A cycle that involves the purchase of items such as inventory; production, sales, delivery of goods or provision of services; and receipts from customers.