x^3+3x+2的判别式的值?() A: -108 B: -216 C: 108 D: 216

当X=[ ]时,5X-9=51[2分]

用边界值分析法，假定50 A: X=50，X=80 B: X=50，X=49，X=80，X=81 C: X=51，X=81 D: X=50，X=81

In 2013, the human population reached 7.1 billion with an annual growth rate of 1.1%. How many people will there be in 2014? A: 7.8 x 106 B: 7.8 x 107 C: 7.8 x 108 D: 7.1 x 106 E: 7.1 x 107

对于8位二进制整数，[x]原=[Y]补=10110011，则X、Y对应的十进制数分别为______。 A: 51，77 B: 51，-77 C: 77，-51 D: 51，-77

利用定积分计算极限 [img=183x43]1803b7612292181.png[/img] A: [img=113x51]1803b7612a80970.png[/img] B: = [img=108x51]1803b76132ed29d.png[/img] C: = [img=94x51]1803b7613ad1e60.png[/img] D: = [img=108x51]1803b76142dd719.png[/img]

利用定积分计算极限 [img=183x43]18030bf6fa006cd.png[/img] A: [img=113x51]18030bf702f20ac.png[/img] B: = [img=108x51]18030bf70c12a4b.png[/img] C: = [img=94x51]18030bf7141479b.png[/img] D: = [img=108x51]18030bf721309e5.png[/img]

利用定积分计算极限 [img=183x43]1802f66f7a1305d.png[/img] A: [img=113x51]1802f66f827de6d.png[/img] B: = [img=108x51]1802f66f8abfe9c.png[/img] C: = [img=94x51]1802f66f9275ff5.png[/img] D: = [img=108x51]1802f66f9b0a7f8.png[/img]

利用定积分计算极限 [img=183x43]18033f1ef4a7650.png[/img] A: [img=113x51]18033f1efd6a16a.png[/img] B: = [img=108x51]18033f1f07267a9.png[/img] C: = [img=94x51]18033f1f10c5811.png[/img] D: = [img=108x51]18033f1f1d75228.png[/img]

利用定积分计算极限 [img=183x43]1803404629b514e.png[/img] A: [img=113x51]1803404631df944.png[/img] B: = [img=108x51]180340463b184f5.png[/img] C: = [img=94x51]1803404642c8366.png[/img] D: = [img=108x51]18034046506befb.png[/img]