判断螺柱连接装配画法的对错，答案正确应该是：
A: [img=228x505]1803d0de3e7c5ba.jpg[/img]
B: [img=223x503]1803d0de4cb8175.jpg[/img]
C: [img=218x503]1803d0de592ae03.jpg[/img]
D: [img=218x507]1803d0de663163e.jpg[/img]
A: [img=228x505]1803d0de3e7c5ba.jpg[/img]
B: [img=223x503]1803d0de4cb8175.jpg[/img]
C: [img=218x503]1803d0de592ae03.jpg[/img]
D: [img=218x507]1803d0de663163e.jpg[/img]
举一反三
- 判断螺柱连接装配画法的对错，答案正确应该是： A: [img=228x505]180356b8b829366.jpg[/img] B: [img=223x503]180356b8c69c82a.jpg[/img] C: [img=218x503]180356b8d33d933.jpg[/img] D: [img=218x507]180356b8dfc18ed.jpg[/img]
- 判断螺柱连接装配画法的对错，答案正确应该是： A: [img=228x505]1803d75f7136a23.jpg[/img] B: [img=223x503]1803d75f7fc1651.jpg[/img] C: [img=218x503]1803d75f8d425f3.jpg[/img] D: [img=218x507]1803d75f9b1fe35.jpg[/img]
- 判断螺柱连接装配画法的对错，答案正确应该是： A: [img=228x505]18036e402501d3a.jpg[/img] B: [img=223x503]18036e40339634a.jpg[/img] C: [img=218x503]18036e40420c468.jpg[/img] D: [img=218x507]18036e404febc48.jpg[/img]
- 设随机变量(X,Y)在区域｛(x,y): 0<|y|< x <2｝内均匀分布，则以下结果正确的是 A: 当0<x<2时，[img=96x25]1802dded7db6eef.png[/img]. B: E(X)=4/3 C: 当0<|y|<2时,[img=105x45]1802dded872b92f.png[/img]. D: P(X<1)=0.5 E: 当0<x<2时,[img=110x45]1802dded915de6e.png[/img]. F: E(X)=2/3 G: 当0<y<2时，[img=95x43]1802dded9a54300.png[/img].
- 下列4个集合中是空集的是（） A: ｛x|[img=18x22]1802f060e2f728f.png[/img]+1=0｝ B: ｛x|[img=18x22]1802f060e2f728f.png[/img]<-x｝ C: ｛x|[img=18x22]1802f060e2f728f.png[/img]=0｝ D: ｛x|[img=18x22]1802f060e2f728f.png[/img]-1=0｝