【单选题】Tom likes cars. He enjoys______ model cars of all kinds.
【判断题】砂土的抗剪强度来源于土体的内摩擦力和黏聚力 。
【判断题】前言的目标是吸引读者阅读论文的全文;提供足够的背景信息,使读者对本文目的有所了解。()
【判断题】传递函数的分母就是系统的特征方程式。()
【单选题】Tom likes cars. He enjoys _________ model cars of all kinds.
【单选题】Sam likes cars. He enjoys _______ all kinds of model cars. . [ ]