1, fused deposition molding 3D printer, the working temperature of the print head nozzle is ().
About 50 degrees
B. 100 degrees or so
C. 150 degrees or so
D.D.200 above 200 degrees
Correct answer: above 200 degrees.
2. The fused deposition molding PLA consumables in the throat of 2.3D printer did not melt. ()
A. correct
B. mistakes
Correct answer: a
3. Using 3D printing technology, Yungang Grottoes 18 Grottoes have achieved one-to-one high-precision modular replication. ()
A. correct
B. mistakes
Correct answer: a
4. On the fused deposition 3D printer, the extruder uses () stepping motor.
A. 1
B.2
C.3
Dingsi
Correct answer: 1
5. Stereo mask aligner 3D printer adopts ultraviolet integrated lamp beads, whose wavelength is ().
405 nm
850 nm
C. 13 10nm
D. 1550 nm
Correct answer: 405 nm.
6. Save the model established in Solidworks software as STL format, and copy it directly to 3D printer with SD card for printing. ()
A. correct
B. mistakes
Correct answer: b
1, you can make a square with ordinary A4 printing paper and 502 glue. ()
A. correct
B. mistakes
Correct answer: a
2, SCT89C52 single chip microcomputer has () pin.
A.20
b30
C.40
Cao 50
Correct answer: 40
3. The voltage (or current) output from the I/O port of 3.SCT89C52 single chip microcomputer can be infinite, and no motor drive module is needed. ()
A. correct
B. mistakes
Correct answer: b
4. The research focus of the challenge car project: independent stage technology. The technical difficulty is how the robot can identify itself on and off the stage, and make the stage mechanism complete the stage action according to its different positions. ()
A. correct
B. mistakes
Correct answer: a
5,2014, Professor John, University College London, UK? O'Keefe (John o? Keefe) and May Britt, a Norwegian scientist? May Mo Ze and Edward? Mo Ze and his wife won the 20 14 Nobel Prize ().
A. physiology or medicine prize
B. Physics Prize
C. chemistry prize
D. Peace Prize
Correct answer: Prize in Physiology or Medicine
6. The positioning result obtained from the dead reckoning of Chang 'e-3 mission is only used as the initial reference of the visual positioning method, and the precise positioning of the patrol is realized by the visual positioning method. ()
A. correct
B. mistakes
Correct answer: a
1, 3D printed prosthesis is equipped with EMG sensor and artificial intelligence control system, which work together to enable amputees to grasp objects and move their fingers independently. ()
A. correct
B. mistakes
Correct answer: a
2. The National Museum of China designed the 3D nightlight of Wenchuang products according to the model of pastel apricot forest spring swallow pattern bottle. ()
A. correct
B. mistakes
Correct answer: a
3. The 3.LED faucet temperature-sensing tricolor lamp can be used without external power supply. ()
A. correct
B. mistakes
Correct answer: a
4. Color LED strips are attached to the disc of the visual persistence demonstration device as light-passing signs, and this lamp can produce any color. ()
A. correct
B. mistakes
Correct answer: a
On March 4, 5.20 19, Google announced that pi had been calculated to one trillion digits after the decimal point, and a new world record was born.
Answer 5
10
C.3 1.4
Cao 55
Correct answer: 3 1.4
6, in daily life, college students can design ().
A. intelligent wardrobe
B. Intelligent medicine box
C. Intelligent wheelchair