【判断题】生产可能性曲线说明的基本原理是一国资源总能被充分利用。
【判断题】培训的效果具有后延性,即短期未必产生效益但可以产生较长的效益。()
【单选题】I used a computer, _________it would have taken me much longer to finish thework.
【单选题】This poem makes you read ______.
【单选题】Beneath me on the other side of the hill was a circle of old stone _____.
【单选题】一个 Java Application必须有一个主类包含 方法
【单选题】已知两个正弦量为u1=20sin(314t+π/6)V,u2=40sin(314t-π/3)V,则( )
【单选题】24)已知两个正弦量为u1=20sin(314t+π/6)V,u2=40sin(314t-π/3)V,则( )。
【单选题】—Will you take these shoes? —No, they don’t fit me. Show me ________.