Một cái lều ở trại hè có dạng hình lăng trụ đứng tam giác (hình vẽ). Biết AH = 1,2m; CC' = 5m; B'C' = 3,2m; A'C' = 2m.
a) Cho biết thể tích của hình lăng trụ đứng tam giác được tính theo công thức V = S.h, trong đó S là diện tích đáy, h là chiều cao. Tính theo m3 thể tích của khoảng không ở bên trong lều này.
b) Số mét vải bạt cần phải có để dựng lều đó là bao nhiêu? (Không tính các mép và nếp gấp của lều).
(1) ... the most popular (2) ... in the world, Easter is the most widely (3) ... . It celebrates the (4) ... of Jesus from death. (5) ... Easter day, children are often given sugar-eggs made from chocolate (6) ... they are good. People often crowd the streets to watch the colorful parades. Everyone looks eager at Easter.
1.
A. Among
B. Besides
C. In
D. Almost
2.
A. celebrate
B. celebrates
C. celebrations
D. celebrating
3.
A. held
B. celebrate
C. given
D. used
4.
A. revive
B. survive
C. revival
D. alive
5.
A. At
B. In
C. To
D. On
6.
A. because
B. so
C. therefore
D. as long as
Choose the best answer:
1) "..." means a piece of land full of rubbish.
A. junkyard
B. treasure
C. hedge
D. stream
2) Unless you understand, I ... explain it again to you.
A. will
B. won't
C. would
D. wouldn't
3) My brother was ... as the most effective activist in the school charity program.
A. said
B. nominated
C. invited
D. appointed
4) Sue ... . She never seems to stop.
A. work continuously
B. works continuously
C. works continuous
D. continuous works
5) We have cut down so many ... that there are now vast areas of wasteland all over the world.
A. electricity
B. plants
C. trees
D. wood
6) Early warnings about tornadoes could save many ... .
A. lives
B. life
C. living
D. things
7) ... his high pay, Thomas was happy in his job.
A. Though
B. Because
C. Because of
D. Despite
8) I lived in Da Lat, ... is the most beautiful cities of Viet Nam.
A. where
B. which
C. that
D. what
9) At last, I've found the information that you are looking ... .
A. at
B. for
C. after
D. up to
10) "Why don't we install a solar panel on the roof of the house?" - "... ."
A. It would be better.
B. Now, let's started.
C. That's very kind of you.
D. Great! Let's do that.