1、Passengers should send their application to Air France _____.(单选题)
A. upon receiving the application form
B. within 3 weeks of their first flight
C. before their first flight with Air France
D. within 6 months of joining the program
试题答案:B
2、设二项式 的展开式中x 3的系数为A,常数项为B,若B=4A,则a的值是( ).(单选题)
A. 4
B. -4
C. -2
D. 2
试题答案:D
3、函数 的定义域为( ).(单选题)
A. x>
B. x≥
C. <x≤1
D. x≤1
试题答案:C
4、下列粒子中,带正电的是( ).(单选题)
A. 电子
B. 质子
C. 中子
D. 原子
试题答案:B
5、在竖直平面内,有一长直载流导线和一矩形导体线框,线框的长边平行于载流导线,如图所示.当线框做下列运动时,不产生感应电流的是( ).
(多选题)
A. 线框向上平移
B. 线框向左平移
C. 线框向右平移
D. 线框绕P点在纸面内旋转
试题答案:A
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