LH Quảng cáo: lazijsc@gmail.com

Read the following passage, and answer the questions that followOhioIn 1878, Thomas Edison began serious research into developing a practical incandescent lamp and on October 14, 1878, Edison filed his first patent application for "Improvement In Electric Lights". In 1879 he created a successful incandescent light bulb. This was his hardest project – from 1877 to 1880, Edison and his assistants tried around 3000 experiments to perfect their light bulb design. By the end of 1880, Edison had ...

Đặng Bảo Trâm | Chat Online
02/09 11:07:22 (Tiếng Anh - Lớp 8)
12 lượt xem

Read the following passage, and answer the questions that follow

Ohio

In 1878, Thomas Edison began serious research into developing a practical incandescent lamp and on October 14, 1878, Edison filed his first patent application for "Improvement In Electric Lights". In 1879 he created a successful incandescent light bulb. This was his hardest project – from 1877 to 1880, Edison and his assistants tried around 3000 experiments to perfect their light bulb design. By the end of 1880, Edison had produced a bulb that lasted 1500 hours. This discovery marked the beginning of commercially manufactured light bulbs and in 1880, Thomas Edison’s company, Edison Electric Light Company began marketing its new product.

How many hours did the 1880 bulb last?

Vui lòng chờ trong giây lát!
Lựa chọn một trả lời để xem Đáp án chính xác Báo sai đáp án hoặc câu hỏi
Số lượng đã trả lời:
A. 3000
0 %
0 phiếu
B. 1500
0 %
0 phiếu
C. 1880
0 %
0 phiếu
D. 1878
0 %
0 phiếu
Tổng cộng:
0 trả lời
Bình luận (0)
Chưa có bình luận nào, bạn có thể gửi ý kiến bình luận tại đây:
Gửi bình luận của bạn tại đây (*):
(Thông tin Email/ĐT sẽ không hiển thị phía người dùng)
*Nhấp vào đây để nhận mã Nhấp vào đây để nhận mã

Trắc nghiệm mới nhất

×
Trợ lý ảo Trợ lý ảo
×
Gia sư Lazi Gia sư