Centering on the author’s digital detox experience, and reflection, the text of Unit 6 consists of__parts（）
A: 4
B: 3
C: 2
D: 5
A: 4
B: 3
C: 2
D: 5
举一反三
- 3. Centering on the author’s digital detox experience, and reflection, the text of Unit 6 consists of ________parts .
- What is the author’s opinion about his Internet detox experience?
- After doing the digital detox, the author’s attitude towards internet is . A: indifferent B: appreciative C: neutral
- Propulsion control systems are generally composed of .1) Remote control device；2) telegraph system；3) Logical control unit；4) Speed and load control unit；5) Safety protection unit；6) Main engine pneumatic control system A: 1) 2) 3) 4) 5) 6) B: 1) 2) 3) 4) 5) C: 1) 2) 3) 6) D: 2) 3) 4) 5) 6)
- 39号元素钇的核外电子排布式是下列排布中的（ ） A: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 4 d 1 5 s 2 B: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 5 s 2 5 p 1 C: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 4 d 2 5 s 1 D: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 5 s 2 5 p 1