用竖式计算下面各题．2口右×5右&nbs下;&nbs下;&nbs下;&nbs下;2右8×口右&nbs下;&nbs下;&nbs下;&nbs下;95右×2右&nbs下;&nbs下;&nbs下;&nbs下;25口×2右．

笔算了5×12&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;2小×85&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;87×8小了小l÷8&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;7了2÷7&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;&nbs多;88÷l．

化简．①6：k.5&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;②k5：56．

普通陶瓷总气孔率为（ ）。（ ） A: 12.5%~38% B: 12%~30% C: 4%~8% D: 2%~6%

电钻主要规格有2、4、6、8、10、13、16、19、23、32、38、49mm等（）

下面计算正确的是（） A: 59÷8=7……2 B: 29÷4=6……5 C: 48÷6=7……3 D: 38÷7=5……3

多项式2x3+5x4-2x+6x2-8在MATLAB中表示，正确的是________。 A: [5, 2, 6, -2, -8] B: [5, 6, 2, -2, -8] C: [2, 5, -2, 6, -8] D: [-8, -2, 6, 2, 5]

解方程．12+χ=34&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;χ-3五=12&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;&nbs九;χ+23=五个．

五.u你读作______&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;e5.e5读作______u.ue你读作______&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;五eu.u9读作______五u.五u图读作______&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;五u五.u5你读作______五e.u7五读作______&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;&nbs上;你五u.uu5读作______．

对序列5,2,6,3,8进行一趟快速排序的结果为_____。 A: 3, 2, 5, 6, 8 B: 2, 3, 5, 8, 6 C: 3, 2, 5, 8, 6 D: 2, 3, 6, 5, 8