A. satellite needs to be going fast - at least 8 km (5 miles) a second.
B. Satellites that travel closer to Earth contend with drag of more atmospheric molecules.
C. Satellites keep a perpetual connection with a fixed antenna on the ground.
Giải bởi Vietjack
Đáp án D
Kiến thức: Đọc hiểu
A. Vệ tinh cần đi nhanh - ít nhất là 8 km (5 dặm) một giây
B. Các vệ tinh đi gần Trái đất phải đối mặt với lực cản của nhiều phân tử khí quyển hơn
C. Vệ tinh giữ kết nối vĩnh viễn với một ăng-ten cố định trên mặt đất
D. Các chuyến bay Apollo lên mặt trăng đã diễn ra trong Trái Đất trên quỹ đạo thấp, kéo dài từ khoảng 160 đến 2.000 km (khoảng 100 đến 1.250 dặm).
Tạm dịch: One is called low-Earth-orbit, which extends from about 160 to 2,000 km (about 100 to 1,250 miles). This is the zone where the ISS orbits and where the space shuttle used to do its work. In fact, all human missions except for the Apollo flights to the moon took place in this zone
(Một cái được gọi là trái đất quỹ đạo thấp, kéo dài từ khoảng 160 đến 2.000 km (khoảng 100 đến 1.250 dặm). Đây là khu vực mà ISS quay quanh và nơi tàu con thoi từng làm công việc của mình. Trên thực tế, tất cả các sứ mệnh của loài người ngoại trừ các chuyến bay của Apollo lên mặt trăng đều diễn ra trong khu vực này)Gói VIP thi online tại VietJack (chỉ 200k/1 năm học), luyện tập gần 1 triệu câu hỏi có đáp án chi tiết
___________ appears considerably larger at the horizon than it does overhead is merely an optical illusion.
Read the following passage and mark the letter A, B, C or D on your answer sheet to choose the word or phrase that best fits each other numbered blanks.
MARITAL PROBLEMS
When people marry, they're usually in love and happy to be tying the (46) _______. But after that, things tend to change. On average, couples' satisfaction with their marriage declines during the first years of marriage and, if the decline is particularly steep, divorce may follow. The course of true love runs downhill.
For around 30 years, researchers have studied how having children affects a marriage, and the results are (47) ________: the relationship between spouses suffers once kids come along. Comparing couples with and without children, researchers found (48) _________ the rate of the decline in relationship satisfaction is nearly twice as steep for couples who have children than for childless couples. In the (49) ________ that a pregnancy is unplanned, the parents experience even greater negative impacts (50) ________ their relationship.
The irony is that even as the marital satisfaction of new parents declines, the likelihood of them divorcing also declines. So, having children may make you miserable, but you'll be miserable together.
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Mark the letter A, B, C, or D on your answer sheer to indicate the underlined part that needs correction in each of the following questions.
The guest of honors, along with his wife and children, were sitting at the first table when we had a party yesterday.
Tom and Tony are talking about a tennis game.
Tom: "I thought your tennis game was a lot better today, Tony".
Tony:" _________! I thought it was terrible."
Mark the letter A, B, C, or D on the answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
Farmers depend on meteorologists. They need meteorologists' accurate forecasts for successful agricultural planning.
