每次加热时间不宜太短,也不宜太长,应控制在( )。 A: 150~250s B: 250~400s C: 400~550s D: 50~150s
每次加热时间不宜太短,也不宜太长,应控制在( )。 A: 150~250s B: 250~400s C: 400~550s D: 50~150s
请计算和下列曝光一致的数值F4 1/500s ISO400F4.5 1/400s ISO______ F13 ______ s ISO1000
请计算和下列曝光一致的数值F4 1/500s ISO400F4.5 1/400s ISO______ F13 ______ s ISO1000
已知4进制数字信号的传码率为400波特,转换为2进制数字信号的传输速率为_( )___。 A: 400 b/s B: 800 b/s C: 1600 b/s D: 3200 b/s
已知4进制数字信号的传码率为400波特,转换为2进制数字信号的传输速率为_( )___。 A: 400 b/s B: 800 b/s C: 1600 b/s D: 3200 b/s
Laura's office is 400 square feet. Luis's office is 200 square feet. Laura's office ___________________ (big) Luis's office.
Laura's office is 400 square feet. Luis's office is 200 square feet. Laura's office ___________________ (big) Luis's office.
Well, you want $400 and I say $300, so let's com________ at $350.
Well, you want $400 and I say $300, so let's com________ at $350.
ADC0809转换时间为( )μs A: 200 B: 300 C: 100 D: 400
ADC0809转换时间为( )μs A: 200 B: 300 C: 100 D: 400
【单选题】某位摄影初学者拍摄场景时,成片曝光基本准确,但未达到小景深突出主体的目的,他现在使用的 快门值S 1/60秒,光圈值F8,ISO 800。请在下列中选出合适的组合,满足噪点降低,但是曝光准确。 A: S 1/30 F8 ISO 400 B: S 1/125 F4 ISO 400 C: S 1/30 F4 ISO 400 D: S 1/30 F11 ISO 800
【单选题】某位摄影初学者拍摄场景时,成片曝光基本准确,但未达到小景深突出主体的目的,他现在使用的 快门值S 1/60秒,光圈值F8,ISO 800。请在下列中选出合适的组合,满足噪点降低,但是曝光准确。 A: S 1/30 F8 ISO 400 B: S 1/125 F4 ISO 400 C: S 1/30 F4 ISO 400 D: S 1/30 F11 ISO 800
若执行下述程序时从键盘输入3 4,则输出结果是( )。#include [stdio.h]main( ){ int a,b,s;scanf("%d%d",&a,&b);s=a; if (a<b) s=b; s*=s; printf("%d\n",s*s); } A: 186 B: 256 C: 324 D: 400
若执行下述程序时从键盘输入3 4,则输出结果是( )。#include [stdio.h]main( ){ int a,b,s;scanf("%d%d",&a,&b);s=a; if (a<b) s=b; s*=s; printf("%d\n",s*s); } A: 186 B: 256 C: 324 D: 400
With the arrival of the tribes from central Europe to Great Britain in 400 A.D., English has sprouted in today’s England.
With the arrival of the tribes from central Europe to Great Britain in 400 A.D., English has sprouted in today’s England.
根据试验温度选用毛细管粘度计,对内径0.4mm的粘度计,试样流动时间不得少于()。 A: 350s B: 200s C: 400s D: 150s
根据试验温度选用毛细管粘度计,对内径0.4mm的粘度计,试样流动时间不得少于()。 A: 350s B: 200s C: 400s D: 150s