【单选题】Lesson Six is ________ most difficult lesson; but it isn't ________ most difficult lesson in Book Two.
【单选题】下列命题中,正确的是( ) ①数列 { (-1) n ? 3 } 没有极限; ②数列 { (-1) n ? 2 n } 的极限为0; ③数列 { 3 + (- 3 2 ) n } 的极限为 3 ; ④数列 { 2 n ( 3 ) n } 没有极限.
【单选题】Lesson 5 is _____ most difficult lesson , but it isn’t _____ most difficult lesson in Book Two .
【简答题】Lesson Two : Listen and fill in the blanks with callsigns and letters -1 1) _______ , Delta Approach, report _______
【单选题】Lesson Three is ____ most difficult lesson, but it isn’t ____ most difficult lesson in Book Two.
【单选题】观察下列数列当n 时,该数列是否有极限,如果有极限是多少?
【单选题】《中华人民共和国教师法》规定,教师是履行教育教学职责的专业人员,承担 ( ) ,培养社会主义事业建设者和接班人,提高民族素质的使命。