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Humans have dreamed of spaceflight since ancient times. The Chinese used rockets for ceremonial and military purposes centuries ago, but in the second half of the 20th century, the first rockets were developed to open space to human exploration.The earliest practical work on rocket engines designed for spaceflight occurred simultaneously during the early 20th century in three countries: in Russia, by Konstantin Tsiolkovski; in the United States, by Robert Goddard; and in Germany, by Hermann Oberth.The first U.S. satellite, Explorer 1, went into orbit on January 31,1958. In 1961, Alan Shepard became the first American to fly into space. On February 20,1962, John Glenn's historic flight made him the first American to orbit Earth."Landing a man on the moon and returning him safely to Earth within a decade" was a national goal set by President John F. Kennedy in 1961. On July 20,1969, Neil Armstrong took "a giant step for mankind" as he stepped onto the moon. Six Apollo missions were made to explore the moon between 1969 and 1972.By the early 1970s orbiting communications and navigation satellites were in everyday use, and the Mariner spacecraft was orbiting and mapping the surface of Mars. By the end of the decade, the Voyager spacecraft sent back detailed images of Jupiter and Saturn, their rings, and their moons.
1. When did Explorer 1 go into orbit?
A. In 1958
B. In 1962
C. In 1969
D. In 1972
2. What happened in July 1969?
A. Satellites were in everyday use
B. American set a national goal
C. Neil Armstrong set foot on the moon
D. Six Apollo missions were made
3. Which of the following is NOT true?
A. The Voyager spacecraft sent back images of Jupiter and Saturn
B. The first rockets were developed in the 20th century
C. President John F. Kennedy landed a man on the moon
D. Alan Shepard was the first American to fly into space
Hãy luôn nhớ cảm ơn và vote 5*
nếu câu trả lời hữu ích nhé!
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`1. A`
`-` Dẫn chứng: d to open space to human exploration.The earliest practical work on rocket engines designed for spaceflight occurred simultaneously during the early 20th century in three countries: in Russia, by Konstantin Tsiolkovski; in the United States, by Robert Goddard; and in Germany, by Hermann Oberth.The first U.S. satellite, Explorer 1, went into orbit on January 31,1958.
`2. C`
`-` Dẫn chứng: On July 20,1969, Neil Armstrong took "a giant step for mankind" as he stepped onto the moon.
`3. B`
`-` Dẫn chứng: The Chinese used rockets for ceremonial and military purposes centuries ago, but in the second half of the 20th century, the first rockets were developed to open space to human exploration.
Hãy giúp mọi người biết câu trả lời này thế nào?
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`1.` `A`
`-` Dẫn chứng : The first U.S. satellite, Explorer 1, went into orbit on January 31,1958.
`2.` `C`
`-` Dẫn chứng : On July 20,1969, Neil Armstrong took "a giant step for mankind" as he stepped onto the moon.
`3.` `D`
`-` Dẫn chứng :
`+` In 1961, Alan Shepard became the first American to fly into space.
`+` By the end of the decade, the Voyager spacecraft had sent back detailed images of Jupiter and Saturn, their rings, and their moons.
`+` Landing a man on the moon and returning him safely to Earth within a decade” was a national goal set by President John F. Kennedy in 1961.
`->` Đáp án `A`, `B`, `C` đúng.
`-` Vì The Chinese used rockets for ceremonial and military purposes centuries ago nên đáp án `D` sai.
Hãy giúp mọi người biết câu trả lời này thế nào?
Bảng tin
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thứ 7 tuần này thi. Lên thớt sắn r, bây h chỉ còn chào và bếp ga thôi
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chỗ c thi khá muộn nhỉ-) Hà tĩnh mai thi r, Hưng yên + bến tre hnhu hôm nay thi.
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HN mà má. Thì thi muộn là phải rùi
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c có nv vào chuyên 0?
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ko. nếu t cho nv vào chuyên thì nhà xa nên ko chọn
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t chắc có, nhà t cx xa trường chuyên nhmak trỏng cx có kí túc xá + nào thíc về thì cx có người lên chở-))
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quan trọng là có đỗ hay 0 th=)
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bố mẹ t ko cho ở trọ