71. | For what does the world owe Almon Strowger a debt of gratitude? |
a. | |
b. | |
c. | |
d. |
72. | In which decade was the telegraph invented? |
a. | 1810s |
b. | 1840s |
c. | 1870s |
d. | 1890s |
73. | What inspired reflecting road lights to be invented? |
a. | |
b. | |
c. | |
d. |
74. | When were blue jeans invented? |
a. | 1900s |
b. | 1860s |
c. | 1870s |
d. | 1850s |
75. | Who invented Electric Generator? |
a. | |
b. | |
c. | |
d. |
76. | What Karl Benz invented? |
a. | |
b. | |
c. | Glider |
d. |
77. | When were bar code scanners invented? |
a. | 1940s |
b. | |
c. | 1970s |
d. | 1960s |
78. | When was the game Frisbee invented? |
a. | 1920s |
b. | 1900s |
c. | 1870s |
d. | 1950s |
79. | What piece of clothing was invented by French fashion designer Louis Reard in 1946? |
a. | |
b. | |
c. | Bikini |
d. |
80. | In which year was MIDI introduced? |
a. | 1987 |
b. | 1983 |
c. | 1973 |
d. | 1977 |