【单选题】Which statement about the use of the profile model is BEST?
A.
The profile model requires careful calculation of the percentage risk for each possible project.
B.
The scale used for the profile model can be any two numerical variables that a company deems important.
C.
The efficient frontier in the profile model is where return is 100% (or greater) and risk is 0%.
D.
For a given level of risk, a positive move on the return axes would indicate a superior project.
【单选题】To model uncertainty in signal processing, we use which of the following tools
【多选题】火花塞瓷芯呈褐黑色瓷芯呈褐黑色,电极附近有块状积碳的原因是?
D.
长时间冷车、低速运转后出现,正常行驶后,会消失
【多选题】定期对蓄电池进行外观检查,应经常清除蓄电池表面的(),保持蓄电池表面清洁、干燥。
【简答题】Choose the appropriate word from those given in brackets and use words from Model 1, key vocabulary and the precious task.