如图所示是某种固体加热变成液态时的温度随时间变化的曲线图，观察图像并回答： （

若方程2x²-3x-m=0有两个正根，则整数m为______．

某女，39岁。月经不调，伴胁肋胀痛，胸闷不舒。治疗首选

A．川楝子

B．益母草

C．木香

D．香附

E．柴胡

At the beginning of the year, two companies issued debt with the same market rate, maturity date, and total face value. One company issued coupon-bearing bonds at par and the other company issued zero-coupon bonds. All other factors being equal for that year, compared with the company that issued par bonds, the company that issued zero-coupon debt will most likely report:（）

A. higher cash flow from operations but not higher interest expense.

B. both higher cash flow operations and higher interest expense.

C. neither higher cash flow from operations nor higher interest expense.

说寡头会造成低效率的资源配置是因为（）

A、产品价格等于边际成本

B、产品价格小于边际成本

C、产品价格大于边际成本

D、上述情况都存在

暂态地电压局部放电检测仪宜具备状态评价功能。提供局部放电信号的（）等信息中的一种或几种，并可采用波形图、趋势图等谱图中的一种或几种进行展示。

A.幅值

B.相角

C.相位

D.放电频次