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Moss that grows in Mojave desert, Antarctica can grow on Mars, claims China
我国科学家发现有望在火星存活的苔藓——齿肋赤藓
一种沙漠苔藓或能帮助人类打造宜居外星球。最近，中国科学院的科学家针对一种名为齿肋赤藓的苔藓植物进行了测试，这种植物存在于西藏、新疆内蒙沙漠、南极等极端地区。结果表明，这种植物能够在火星这种极端条件下生存，并能够将火星上的二氧化碳转化为氧气。
阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
Scientists have identified a kind of desert moss(苔藓) that could help support possible human settlement on Mars, a study by the Chinese Academy of Sciences showed recently.
Mosses 1. ______(believe) to have been the first true land plants on Earth. As such, they developed a 2. ______(tolerate) to extreme stress that allowed them to survive in our planet's severe early environment.
Due to its extraordinary resilience(适应力), Syntrichia caninervis (S. caninervis), a moss 3. ______(find) in extreme desert environments from Tibet to Antarctica, has been praised 4. ______ a "pioneer plant" for establishing livable environment on Mars. 5. ______(basic), scientists believe this plant could enrich the planet's rocky surface to 6. ______(able) the growth of other plants.
The plant can survive very low temperatures. It can recover or regenerate after 7. ______(store) in a freezer at -80 degrees Celsius for five years. It can survive a month in liquid nitrogen(氮), the researchers found.
China and the United States have announced 8. ______ number of space exploration plans in recent years.
Chinese 9. ______(mission) include launching a near-Earth asteroid probe Tianwen-2 next year, and Tianwen-3 around 2030 to collect material from Mars and bring it to Earth for study. The American space agency NASA has developed a 20-year plan for Mars exploration. It is investigating 10. ______ the red planet could support human population.
First-time China flier opens emergency exit thinking it is toilet door, sparks evacuation
首次乘坐航班的乘客误将飞机应急舱门当厕所门拉开，致航班取消
阅读下面短文，在空白处填入1个适当单词或括号内单词的正确形式。
An Air China flight CA2754 from the eastern city of Quzhou had been scheduled to fly to Chengdu in the country’s southwest on July 4. However, a rookie passenger opened an emergency exit door by mistake, 1 (cause) an evacuation slide to deploy. As a result, the plane had to be emptied of passengers and the flight 2 (cancel).
The affected passengers were relocated to a hotel 3 given compensation of 400 yuan (US$55) each. The woman 4 opened the emergency door was also taken to the hotel for questioning by police.
The incident received widespread attention 5 mainland social media. On Weibo, one online observer wrote: “Being a first-time 6 (fly) is no excuse. She could have simply asked the crew where the toilet was.”
Aircraft exit doors are designed to be easily opened 7 (ensure) prompt access in emergencies. Under normal circumstances, the flight crew would 8 (repeated) remind passengers not to accidentally activate them.
9 (depend) on the aircraft model, the cost of activating an emergency exit door ranges from 100,000 to 200,000 yuan (US$28,000). After an evacuation slide deploys aircraft can be grounded for several days for maintenance.
In China, the unauthorised opening of aircraft emergency exit doors is 10 (legal) and can lead to large fines and administrative detention.
China’s new large amphibious aircraft goes into production and final assembly
中国新型大型水陆两栖飞机进入批量生产和总装
阅读下面短文，在空白处填入1个适当单词或括号内单词的正确形式。
China’s new large amphibious aircraft – the biggest in the world – has gone into batch production and final assembly, state news agency Xinhua reported.The plane, known 1 the AG600, is designed for maritime patrols and search and rescue operations. From the southern island province of Hainan, it could reach any location in the South China Sea within four hours 2 it could be used for cargo or passenger transport between islands, according to state media.Its 3 (develop), the Aviation Industry Corporation of China (AVIC), told Xinhua on Tuesday that the front assembly for the first batch-produced AG600 4 (deliver) on June 30.It said the delivery of the plane’s front section – which took three months 5 (make) – marked the start of batch production of the aircraft.Final assembly of the amphibious plane will 6 (do) in the southern city of Zhuhai, in Guangdong province, by AVIC subsidiary AVIC General Huanan Aircraft Industry Co, Xinhua reported.The AG600 was developed to meet 7 (grow) demand for an emergency rescue aircraft 8 could be used in maritime searches. Work started on the plane in 2014, with maiden flights 9 (conduct) over land in 2017 and at sea in 2020, according to state media reports. Airworthiness tests began this year. China is trying to develop 10 (many) home-grown aircraft – like the AG600, the Y-20 large transport plane and the C919 single-aisle passenger jet – under a government plan to upgrade production equipment across industries through 2027.
答案与解析
我国科学家发现有望在火星存活的苔藓——齿肋赤藓
1.are believed
2.tolerance
3.found
4.as
5.Basically
6.enable
7.being stored
8.a
9.missions
10.whether/if
解析：
1.are believed, 考查谓语动词。句意：苔藓被认为是地球上第一个真正的陆地植物。句子的主语“Mosses”与“believe”之间是被动关系，“be believed to do sth.”是固定用法，表示“被认为......”，且根据语境，此处用一般现在时，主语是复数，所以用“are believed”。
2.tolerance，考查名词。a+单数可数名词，因此要用动词tolerate（容许；忍受；有耐受性）的名词形式tolerance（宽容，容忍；限度；公差；耐药量，耐药性）。句意：它们对极端压力形成一种耐受性，这使它们能够在地球早期恶劣的环境中生存下来。
3.found，考查过去分词作定语。句子分析：Syntrichia caninervis (S. caninervis)是主语， has been praised是谓语，a moss 3. ______(find) in extreme desert environments from Tibet to Antarctica, 是同位主语，moss与find构成被动关系，因此用过去分词作定语，表示被发现的苔藓。句意如4。
4.as，考查介词。be praised as被称赞为,被誉为。由于其非凡的适应力，Syntrichia caninervis，一种被在从西藏到南极洲的极端沙漠环境中发现的苔藓，被誉为在火星上建立宜居环境的“先锋植物”。
5.Basically，考查副词修饰句子。
6.enable，考查动词。enable （v. 使能够；使可行）。句意：基本上，科学家们认为这种植物可以丰富地球的岩石表面，使其他植物能够生长。
7.being stored，考查非谓语动词。after+名词/动词的ing结构/句子。填空处动词store紧跟着after，因此不能考虑谓语动词，而句子主语it与store之间构成被动关系，它被保存，因此应用被动语态的ing结构being stored。after being stored意为“在被保存后”。句意：在零下80度的冰柜中保存5年后，它（这种植物）可以恢复或再生。
8.a，考查冠词。a number of +可数名词的复数形式，表示许多的；大量的。句意：中国和美国近年来已经宣布了很多的太空探索计划。
9.missions，考查名词的数。谓语动词include没加s,可推断主语应该是复数，因此要用mission的复数形式。句意：中国的任务包括明年发射近地小行星探测器天文2号和2030年左右发射天文3号，从火星收集物质并将其带到地球进行研究。
10.whether/if，考查连词。句意：美国宇航局制定了20年火星探索计划。它正在调查这颗红色星球是否能养活人类人口。
中国新型大型水陆两栖飞机进入批量生产和总装
1. as 考查介词。分析句意可知，此处指该飞机被称为AG600，be known as意为“被称为……；被认为是……；以……著称”，为固定表达，故填介词as。
2. and 考查连词。分析句子结构和句意可知，此处连接两个简单句，表顺承关系，故填连词and。
3. developer 考查名词。根据句意可知，此处表“开发者；开发商”，故填名词developer。
4. was delivered 考查时态语态。分析句子结构和句意可知，本空在句中作谓语，因讲述过去发生的事情，时态用一般过去时，又因句子主语和所给的动词deliver之间是被动关系，故填一般过去时的被动语态。
5. to make 考查非谓语动词。分析句子结构可知，此处是固定表达Sth. takes some time to do，表示某事需要一定的时间来完成或实现，故填动词不定式。
6. be done 考查时态和语态。分析句子结构可知，本空在句中作谓语，因句子主语和动词do之间是被动关系，故填be done，和句中的will构成一般将来时的被动语态。
7. growing 考查形容词。分析句子结构可知，本空在句中作定语，修饰demand，表示“增长的；增加的”，故填形容词growing。
8. that/ which 考查定语从句关系词。本句是一个限制性定语从句，先行词emergency rescue aircraft指物，关系词代替先行词在从句中作主语，故填关系代词that或which。
9. conducted 考查非谓语动词。分析句子结构可知，此处是with的复合结构，因动词conduct和with的宾语maiden flights之间是被动关系，故填过去分词作宾语补足语。
10. more 考查形容词比较级。根据句子结构和句意可知，本空在句中作定语，修饰home-grown aircraft，表示更多的，故填many的比较级more。注意aircraft单复数同形。
首次乘坐航班的乘客误将飞机应急舱门当厕所门拉开，致航班取消
1. causing 考查非谓语动词。分析句子结构和句意可知，本空在句中作状语，表结果。因句子的主语和动词cause之间是主动关系，故填动词-ing形式。
2. was cancelled 考查时态和语态。分析句子结构和句意可知，本空在句子作谓语，因讲述过去发生的事情，时态用一般过去时，又因主语the flight和动词cancel之间是被动关系，故填一般过去时的被动语态。
3. and 考查连词。分析句子结构可知，本空在句中连接两个先后发生的动作，表顺承，故填连词and。
4. who/that 考查定语从句关系词。本句是一个限制性定语从句，先行词woman指人，关系词代替先行词在从句中作主语，故填关系代词who或that。
5. on 考查介词。根据句意可知，此处指在社交媒体上，故填介词on。
6. flier/flyer 考查名词。分析句意可知，此处指一位首次乘坐飞机的“飞机乘客”，故填名词flier或flyer。
7. to ensure 考查非谓语动词。分析句子结构和句意可知，本空在句中作状语，表目的，故填动词不定式。
8. repeatedly 考查副词。分析句子结构可知，本空在句中作状语，修饰谓语，表示“重复地，再三地”，故填副词。
9. Depending 考查非谓语动词。分析句子结构可知，本空在句中作状语，表条件，因句子主语和动词短语depend on之间是主动关系，故填动词-ing形式。
10. illegal 考查形容词。根据句意可知，此处表“非法的”，故填legal的反义词illegal。

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