B.
90度≤α<180度< /div>
C.
90度≤α<180度或α=0度< /div>
【判断题】海上航行期间,人员一旦发现火灾即应立即报警,但对自行熄灭的火灾无需报告。
【判断题】直线的倾斜角的取值范围是[0,180 o ].
【单选题】对于飞猪旅行集市的管理,飞猪旅行集市管理规范有规定的,按照飞猪旅行集市管理规范执行;飞猪旅行集市管理规范未有规定的,按照()执行。
【单选题】听力原文:M: I have such a bad ear infection that I won't be able to come to the final exam this afternoon. W: Only your instructor can tell you what to do in this situation. Q: What does the woman mean? (...
A.
The man shouldn't attend the exam.
B.
The man should ask his instructor's opinion.
C.
Only a doctor can tell him what to do.
D.
The instructor won't watch the students in the exam.