题目内容

一般情况下，晶体三极管的电流放大系数随温度的增加而__。

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In an era of heightened heroism, who are the heroes among us? They can be ordinary people like Daniel Hernandez who ran through danger in a mass shooting to save his boss and Dory Stoddard who saved his wife by _______ her from the hail of bullets

Both of them are ______ heroes as they acted with courage and grace

when __________ extraordinary circumstance.

Then are first responders considered heroes, too? We get the answer from Sergeant. Ryan Russell, who got killed in his efforts to help others but was _______ by thousands of other emergency responders.