【单选题】在其著作Book of Optics中,()解释光线以圆锥形式投射到眼睛中。
【单选题】听力原文:W: May I speak to Mr. Li? M: Which Li, ma'am? There are two Lis here. W: Oh? Mr. Li, head of the Export Section. M: Oh, the chief? That's Mr. Michael Li, then. W: Is that right? M: I'm sorry, but...
【单选题】–Who is the man over there ? Is it Mr. Li? --No, it_____be him . Mr. Li is much taller.
【单选题】— Who is the man over there? Is it Mr. Li? — No, it _____ be him. Mr. Li is much taller. [ ]
【简答题】阅读理解。 This is a picture of Mr. Li's family. The man in the middle is Mr. Li. The woman is Mr. Li's wife. They have two sons. The child behind Mr. Li is Li Lei. He's thir. The other in front of Mrs...
【单选题】—Who is the man over there? Is it Mr. Li? —No, it _______ be him, Mr. Li has left for Hong Kong. [ ]
【单选题】—Look! The lights in the teachers' office are still on. Is Mr. Li working? —No. It _______ be Mr. Li. I saw him leave just now. [ ]
【简答题】This is s picture of Mr. Li’s family. The man in the middle is Mr. Li. The woman is Mrs. Li. They have two sons. The child behind Mr. Li is Li Lei. He’s thir. The other in front of Mrs. Li is Li M...