Top Posters
Since Sunday
e
4
h
4
h
4
m
3
d
3
B
3
o
3
w
3
H
3
a
3
c
3
k
3
Home Q & A Board Science-Related Homework Help Psychology
New Topic  
colleen colleen
wrote...
Go to Answer
Valued Member
Posts: 17076
Rep: 251 1
10 years ago
The invention of the __________ enabled the fourth social revolution.
a.    adding machine
b.    microchip
c.    abacus
d.    sewing machine
Read 764 times
2 Replies
Sunshine ☀ ☼
Replies
Answer accepted by topic starter
padrepadre
wrote...
#1
Staff Member
Educator
Top Poster
Posts: 21610
Rep: 4541 17
10 years ago
Sign in or Sign up in seconds to unlock everything for free
1
Mastering in Nutritional Biology
Tralalalala Slight Smile

Related Topics

colleen Author
wrote...
#2
Valued Member
10 years ago
Thx! Smiling Face with Open Mouth
Sunshine ☀ ☼
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1284 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 337
  
 1350
  
 480
Your Opinion
What's your favorite math subject?
Votes: 315
Previous poll results: Which country would you like to visit for its food?