【简答题】A v_____________ is a job or position which has not been filled, or refers to the rooms in a building such as a hotel are available to rent.
【简答题】从97×106=10282,98×108=10584,92×103=9476,94×102=9588,…,可归纳出(100-a)×(100+b)=(A+B-100)×100-C,其中A=______,B=______,C=______.
【简答题】计算: ①[(2x-3y) 2 ] 3 (3y-2x) 3 (3y-2x) 4 (结果用幂的形式表示) ②(x-3y)(x+3y)-(x-3y) 2 ③97×103+99×99 ④(x-2)(x+2)(x 2 +4) ⑤(2x+y-3z)(2x-y+3z) ⑥(3x-2y) 2 -3(3x-y)(3x+y) ⑦(2m-3n)(2m+3n)(4m 2 -9n 2 )
【简答题】运用平方差公式计算:97×10 3 =( ) 2 -( ) 2 。
【单选题】103×97=(100+3)×97 =100×97+3×97运用了 [ ]
【单选题】[6/(1×7)]-[6/(7×13)]-[6/(13×19)]-[6/(19×25)]-……-[6/(97×103)]= ( )
【单选题】Why has Dave not been in the company for a while?
A.
He attended First Aid training.
C.
He went somewhere on holidays.
D.
He went to the theater for a part-time job.