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‘一、选择题(每小题2分.共4()分) 1.计算(一tz’)!的结果是( ). (。4)n。(B)一n。(c)“’ (D)一n5 2.不等式组琶■譬的解集是()_ (。{)x5(B).r4(C)x5(D)x4 3.下面月捧}学记数法表示的各数中,正确的是(). (。·I)0.008=8 x】0。 (B)}25000=12.5×】∥ (C)一0.(X)(】016=一l
First, the multiple-choice questions (each small question 2 points. A total of 4 () points) 1. Calculation (a tz ')! The result is (). (.4) n. (B) a n. (c) "'(D) a n5 2. inequality group Pa ■ ■ solution of the example is () _ (. {) x5 (B). r4 (C) x5 (D) () (I) 0.008 = 8 x] 0 (B)} 25000 = 12.5 ×] ∥ (C) l