通常系统负荷是随时间变化的，其变化规律可用（）来描述。
参考答案：负荷曲线
不通过眶上裂的神经是（）。
A.三叉神经第1支--眼支
B.动眼神经
C.三叉神经第2支--上颌支
D.滑车神经
E.外展神经
Anthony Gleason owns a stock valued at $50 per share. Gleason buys a put option with a strike price of $50 for $3. At expiration of the put option, the stock is valued at $65 per share. The profit from Gleason's portfolio insurance strategy is:
A．
B．
C．
