The purpose of this investigation is to explore……
A: 1
B: 2
C: 3
D:
A: 1
B: 2
C: 3
D:
举一反三
- 中国大学MOOC: The purpose of this investigation is to explore……
- I am determined to ____my purpose at any cost. A: attain B: pledge C: faculty D: explore
- 设集合A={1, 2, 3}, 不是A上的等价关系。 A: {(1, 1), (2, 2), (3, 3)} B: {(1, 1), (2, 2), (3, 3), (1, 3), (3, 1)} C: {(1, 1), (2, 2), (3, 3), (2, 3)} D: {(1, 1), (2, 2), (2, 3), (3, 2), (2, 1), (1, 2), (3, 3), (1, 3), (3, 1)}
- 设集合A ={1, 2, 3}, 下列关系R中哪些是等价关系?A、{<1, 1>, <2, 2>, <3, 3>}B、{<1, 1>, <2, 2>, <3, 3>, <3, 2>, <2, 3>}C、{<1, 1>, <2, 2>, <3, 3>, <1, 3>}D、{<1, 1>, <2, 2>, <1, 2>, <2, 1>, <1, 3>, <3, 1>, <3, 3>, <2, 3>, <3, 2>}
- 已知AABC中,A:B:C=1:2:3,那么a:b:c为() A: 1:2:3 B: 1:√3:2 C: 3:2:1 D: 2:√3:1