D.To find better working conditions.( )37.When was Chinas first medium rocket created?A.In 1955.B.In 1956. C.In 1964.D.In 1970.( )38. What does Paragraph 19、 3 mainly tell us?A.The way Qian Xuesen tried to return to China.B.The reason why a special organization was set up.C...
When was the rocket engine invented? When was the safety bicycle invented? When was the first GPS invented? When were solar panels first invented? When was the first instant camera invented? When was the first jet airplane invented? When was the first internal combustion engine fueled by hydrog...
When was Valentina Tereshkova born? When was NASA National Aeronautics and Space Administration established? When was Orion constellation discovered? When was the first moon landing televised? When is the constellation Cassiopeia visible? When was the last time a Saturn rocket launched?
Unit 4 Amazing ScienceTopic 1 When was it invented?SectionB 1New words and expressionsblub n. 电灯泡 airplane n. 飞机hard-weaing adj. 耐磨的Korea n. 朝鲜;韩国At the end of the class, you will be able touse “was/were done” to introduce some inventions, like their inventors and when...
thecustomers.Theemployeesalsohaveaccess 5 alivevideofeedsotheycansee 6 is goingon. “Therearemanypeople 7 areeagertoworkeventhoughtheycan?tmove.Iftheyhavean opportunitytogetajob,itgivesthemconfidence,”saidtheinventor. WhileDAWNCafewas 8 (original)onlyopenforatrialrun, 9 (it)goalistofounda permane...
squirrel climbed down to the ground to pick another pecan. Once again, he took the pecan back to his secret hiding place inside the hollow(洞) of the tree. Not so secret anymore,I thought. I ran over to the tree and found the hollow was filled with sweet pecans. They were right ther...
The world-famous Katyusha (Russian: Катюша) was the first multiple rocket-launcher vehicle in history. Built from the ZIS-6 truck, it could carry up toforty-eight 132mm light rocketson its folding frame's racks, firing terrible barrages at a range equivalent to that of 75mm field...
When Was NASA Created? NASA placed the 1st man on the moon in 1969. For many Americans, the National Aeronautics and Space Administration (NASA) is one of those national agencies that has been around forever. We have seen images of the first moon landing from 1969 and know that this came...
In June 1964, China successfully created its first medium rocket. Qian also played an important role in developing China’s first man-made satellite(卫星). On April 24, 1970, “Dongfanghong-I was successfully sent into the air.”可知,主要讲述了钱学森对中国做出了巨大的贡献。故选D。 【4】...
s rocket and air travel program. In June 1964, China successfully created its first medium rocket. Qian also played an important role in developing China’s first man-made satellite(卫星). On April 24, 1970, “Dongfanghong-I was successfully sent into the air.”可知,主要讲述了钱学森对中国...