A: 1 - haulage roadway
B: 2 - air inlet roadway
C: 3 - belt conveyor
D: 4 - switch, pump station and electrical equipment
举一反三
- Which of the following is not a common type of rise coal haulage ( )? A: Pipeline haulage B: Belt conveyor haulage C: Tramcar haulage D: Autogenous haulage
- Which of the following is not a major problem to be solved in mine field development method?( ) A: Mining methods B: Shaft (adit) form C: Number of mining levels D: Layout of main haulage roadway
- According to the circuits shown in figure 3 and the figure 4, the current in Figure 5 i = [img=853x121]180317233475736.jpg[/img] Figure 3 Figure 4 Figure 5 A: -6A B: -4 A C: -2 A D: 6A
- In the circuit shown, in terms of its external characteristics, ( )[img=692x106]17e0be1193fdf7f.png[/img]Figure 1 Figure 2 Figure 3 Figure 4 A: Figure 2 is equivalent to Figure 3 B: Figure 1 is equivalent to Figure 4 C: Figure 1 is equivalent to Figure 2
- Which TWO of the following will be classified as non-current assets for a dealer in computer equipment?(1) Computers for resale(2) Vehicles for delivering computers(3) Business capital(4) Office furniture A: 1 and 2 B: 2 and 3 C: 2 and 4 D: 3 and 4
内容
- 0
下列碳正离子稳定性顺序应是( )。(1)[img=55x29]17e0abbe7d0cf4b.png[/img] (2)[img=124x28]17e0abbe86207a6.png[/img] (3)[img=51x28]17e0abbe8f27381.png[/img] (4)[img=61x28]17e0abbe989993f.png[/img] A: (3)>;(4)>;(1)>;(2) B: (4)>;(3)>;(1)>;(2) C: (3)>;(4)>;(2)>;(1) D: (1)>;(4)>;(3)>;(2)
- 1
下列化合物发生消去反应活性顺序是( )。(1)[img=68x22]17da6fc510f381b.png[/img] (2)[img=69x22]17da6fc521ce86c.png[/img] (3)[img=80x18]17da6fc53238d27.png[/img] (4)[img=97x18]17da6fc54228f3d.png[/img] A: (2) ＞ (1) ＞ (4) ＞ (3) B: (2) ＞ (1) ＞ (3) ＞ (4) C: (1) ＞ (2) ＞ (3) ＞ (4) D: (1) ＞ (2) ＞ (4) ＞ (3)
- 2
What will be the output of the following Python code? ( )[img=400x159]17da6574f6fb8aa.png[/img] A: [1, -2, -3] B: Error C: [1, 4, 5 ] D: [-2, -3]
- 3
The number of redundant constraints in the system is （）[img=302x298]1803a03a986d743.png[/img] A: 1 B: 2 C: 3 D: 4
- 4
随机变量X的概率密度为[img=239x61]1802d3e895f944e.png[/img]则常数c为 未知类型：{'options': ['2', '', '1', '3', '4', '1/2', '1/3', '1/4'], 'type': 102}