问题
选择题
数集X={（2n+1）π，n是整数}与数集Y={（4k±1）π，k是整数}之间的关系是（ ）
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答案
答案：C
搜题请搜索小程序“爱下问搜题”
数集X={（2n+1）π，n是整数}与数集Y={（4k±1）π，k是整数}之间的关系是（ ）
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答案：C
| 阅读理解。 A Day in a Class "Good morning, class, "Mr Cruz says. He points (揩向) to the board. "These are what we will do today."
A. 9:00 am B. 10:00 am C. 11:00 am 2. This story happens (发生) on _____. A. Monday B. Tuesday C. Wednesday 3. The students have _____ classes in the morning. A. three B. four C. five 4. This story is mostly about _____. A. who will teach the students B. why the students go to school C. what the class will do 5. The students will _____ at 12:00. A. have science B. read books C. have lunch |