允许吸上真空高度是指水泵在()状态下运行时,水泵所允许的最大的吸上真空高度。
A、特殊
B、一般
C、标准
D、不同
参考答案:C
Corporate officers and directors commonly buy and sell, for their own portfolios, stock in their own corporations. Generally, when the ratio of such inside sales to inside purchases falls below 2 to 1 for a given stock, a rise in stock prices is imminent. In recent days, while the price of MEGA Corporation stock has been falling, the corporation’s officers and directors have bought up to nine times as much of it as they have sold. The facts above best support which of the following predictions
A.The imbalance between inside purchases and inside sales of MEGA stock will grow even further.
B.Inside purchases of MEGA stock are about to cease abruptly.
C.The price of MEGA stock will soon begin to go up.
D.The price of MEGA stock will continue to drop, but less rapidly.
E.(E) The majority of MEGA stock will soon be owned by MEGA’s own officers and directors.
行业分析主要分析行业所属的不同市场类型、所处的不同生命周期以及行业的业绩对证券价格的影响。( )