【简答题】两个弯矩图的叠加不是指图形的简单拼合,而是指两图对应的()叠加。
【单选题】He had promised to come and help us, and ___.
【单选题】下列关于包合物叙述错误的是()
A.
一种分子被包嵌于另一种分子的空穴中形成包合物
E.
包合物为客分子被包嵌于主分子的空穴中形成的分子囊
【单选题】—Don't worry. He'll come and help you. — he doesn't come? [ ]
【判断题】轮胎两侧胎肩早期磨损,胎面中央部位尚未磨损。可能是由车辆长期超载所致。
【判断题】两个弯矩图的叠加不是指图形的简单拼合,而是指两图对应的弯矩纵矩叠加( )。
【简答题】Don't sit there ________ nothing. Come and help me with this table. A. do B. to do C. doing D. and doing
【单选题】— I've asked only one person to come and help us-Sam. — _____ he doesn't come? [ ]