皮皮学，免费搜题
登录
搜题
【简答题】
某正弦函数 u=311sin(314t) ,下列说法正确的是 A. Um=311; U=311; w=314rad/s; 初相位=0 B. Um=311; U=311/√2; w=314rad/s; f=2*3.14*314 Hz C. U=311; w=314rad; T=2*3.14*314s D. Um=311; w=314rad/s; 初相位=0
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】He asked her to go to a concert with him but she __________ his invitation __________ politely.
A.
turned down
B.
turned out
C.
turned away
D.
turned up
【判断题】( ) 爆炸物的技术检查方法主要有:X光技术检查法、炸药探测器检查法(气化物和痕量探测)、核探测系统技术检查法、化学喷显法和电子听诊器(钟控定时装置探测器)检查法等。
A.
正确
B.
错误
【单选题】He coughed day and night. The doctor asked him ______ smoking. [ ]
A.
going on
B.
giving up
C.
to give up
【简答题】A．She wanted to leave him a message. B．She was asked to meet the manager. C．She had something to discuss with him. D．She would go to the airport with him.
【单选题】She _____ the children round him and asked them to listen to her attentively.
A.
gathered
B.
collected
C.
told
D.
drew
【简答题】Bob asked his mother to buy new shoes for him．hut she refused． （ ）
【单选题】以下对break语句的作用描述正确的是：
A.
终止程序
B.
终止本次循环
C.
跳出当前层循环，继续执行循环体以外的语句
D.
终止程序中所有循环，再执行循环以外的语句
【简答题】能力训练6.doc
相关题目：
【判断题】( ) 爆炸物的技术检查方法主要有:X光技术检查法、炸药探测器检查法(气化物和痕量探测)、核探测系统技术检查法、化学喷显法和电子听诊器(钟控定时装置探测器)检查法等。
A.
正确
B.
错误