【单选题】I can’t spend _____ money on the car which is _____ expensive for me.
【单选题】According to the English legend, King Bladud lost his life because
C.
he fell to the ground.
D.
he was hit by a stone.
【判断题】切削速度确定后,用公式 n=1000v/ d 计算主轴转速 n(r/min) 。
【单选题】Burton said he could not swim until the ______ came in because the sea was too far out.