题目

Former President Jimmy Carter believes U.S central intelligence agency is spying on him — so much so, he gives up email to avoid government spies. You know, I have felt that my own communications are probably monitored, Carter told NBC's Andrea Mitchell in an interview broadcast Sunday. And when I want to communicate with a foreign leader privately, I type or write a letter myself, put it in the post office and mail it. I believe if I send an email, it will be monitored, Carter continued. The 89-year-old said the National Security Agency and others have abused the argument that gathe若θ∈(0，π4)，则点P（1，sinθ-cosθ）在平面直角坐标系内位于（　　）A．第一象限B．第二象限C．第三象限D．第四象限