. The students competed in 17 events, showing off their handmade planes and rockets. TEENS ……

通过对科学知识的了解，我们也能制造火箭和汽车GET ready! Five, four, three, two, one, blast off (发射)! With the last words, five rockets (火箭) flew up into the sky.These were not real rockets taking off, though. They were ……

我们造出了自己的火箭！“Three. Two. One. Launch (发射)!” With this order, 20 rockets (火箭) took off! Students... students were excited for the competition and happily worked on their rockets. Some of them even ……

; A. It gives the rocket more thrust.  B. It lets the rocket take off straight away.B. It lets the rocket take off straight away.C. It helps the workers find a safer launch site.  ……

as soon as they had enough thrust (推力). With the new technology, rockets don't just take off immediately... launch as soon as they had enough thrust (推力). With the new technology, rockets don't just take off ……

. It will be powered by six Boeing 747 engines. It will take off from a runway like a normal plane. But unlike... be needed to take the rocket away from the strong pull of gravity (重力). The plane’s first take-off ……

Association.But earlier this month Yao said that he hoped to take the summer off after an exhausting...CHINA'S basketball association said on Monday it expects the Houston Rockets star Yao Ming to play ……

to pull it off. Harden silenced the doubters.He led the Rockets to win two of their first three games... have to add a new name to the list: James Harden.The 23-year-old joined the Houston Rockets on Oct 27 ……

for the plane. If everything goes well, it can take off as early as 2019.... in this cool plane. But it doesn’t carry people. It carries rockets (火箭) instead. The plane can carry ……

武汉农民驾驶自制土飞机飞行3秒后坠地。 LOOK at the plane! It’s all handmade (手工制作的). The maker is Shu Mansheng, 43... yuan to make. It took off (起飞), flew in the air for three seconds and then fell down. The pilot Shu ……

release technology (牵制释放技术). Previously, rockets would take off after ignition (点火) as soon... innovative technique called tethered release technology (牵制释放技术). Previously, rockets would take off after ……

(推力).  Now, with the new technology, rockets don’t just take off straight away. They stay still... enough thrust (推力).  Now, with the new technology, rockets don’t just take off straight away ……

out (喷射出) of the backs of the rockets and push them off the ground.Satellites around Earth人造... any plane. A rocket can only go into space one time.How do rockets fly?火箭助力何处来？Rockets fly straight up ……

out (喷射出) of the backs of the rockets and push them off the ground.Satellites around Earth人造... any plane. A rocket can only go into space one time.How do rockets fly?火箭助力何处来？Rockets fly straight up ……

asked the 25-year-old to name the best basketball player alive, the Houston Rockets’ shooting guard... this season.“He’s the main reason the Rockets are back as a title contending (争夺) team after Yao Ming ……