2020年十一月四级作文【一】
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Different people have different views on_____.Some people think that_____,whereas others aegue that __________.
As far as I am concerned, I agree with the opinion that ___________.For one thing,I firmly believe that ___________.For another,_____________.Just think of________,who/which_______.
Taking all these factors into consideration,we may safely come to the conclusion that______.Only if_______can we _______,just as the saying goes,________________.
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In recent years there have been many reports of ________.It turns a new chapter of _________in China,and will have far-reaching effects in the forthcoming years.
The biggest benefit,in my eyes,is that_______.In addition,_______.Finally,______________.
Apart from the benefits mentioned above,we should also face several unavoidable challenges.In the first place,_____________.In the second place,________.What’s more,_______________.In summary,we should_______________.
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Nowadays more and more ______are commonly and widely used in everyday life,ranging from __________to_____________.
The popularity of _______will have a great influence on ______.On the one hand,_________.On the other hand,__________.
To conclude,____________are just like a double-edged sword.With them we may________.However,one point should be kept in mind that we should make sensible use,always being a master instead of slaving of them.
2020年十一月四级作文【二】
神舟十一号载人飞船搜救任务包括返回舱跟踪测控、搜索寻找、航天员救援、返回舱处置回收4个环节。
第一个环节：跟踪测控
神舟十一号飞船太空启动制动返回程序后，经过约30分钟进入主着陆场设备跟踪范围。
测控设备主要有雷达和光学设备两类。位于主着陆场区西北方向的白云鄂博雷达站捕获到返回舱信号后，迅速测量出返回舱出黑障区前后的轨道;在主着陆场区的大庙场区的测控设备捕获目标后，向返回舱发送“回收着陆系统加电”遥控指令。
这次任务，新增了性能更加先进的光学设备，与原有的设备构成光学测量链，保证不间断拍摄返回舱在黑障区前后及开伞着陆的实况景象，并实时传输至指挥部。
第二个环节：
返回舱搜索寻找
返回舱的搜索寻找主要依靠空中搜救分队。据着陆场区指挥部相关负责人介绍，神舟十一号返回舱空中搜救力量，较以往的固定翼飞机和直升机，这次新增了2架无人机。这使得空中搜寻的视场更大、效率更高。
空中分队的5架直升机在返回舱着陆前，就在以着陆点为中心的36 36公里的区域上空四角待命。返回舱出黑障区后，舱上的信标机开机，向直升机发送信号，直升机则开始定向搜索。返回舱抛大底后，直升机按照定向仪指向归零飞行。
2架无人机在核心着陆场区西北侧和东南侧空域待命飞行，利用光学吊舱辅助进行视频搜寻，同时1架运输机在着陆场上空搜索返回舱信标机发出的`信号，再将相关数据发回指挥部，辅助提供搜索定向信息。
在确定了返回舱的准备位置后，直升机将立即前往，并同时通报地面分队。
第三个环节：航天员救援
当搜救队伍抵达返回舱着陆点后，首先要进行返回舱外观检查，在确认着陆姿态正常，没有燃料泄露等异常情况后，再由搜救队员打开舱门。
随后，医监医保人员进入舱内，对航天员进行血压测量、心跳测量、外伤检查等常规查体。这个过程大约持续20分钟。在确认航天员身体状况良好后，将其转运至医监医保直升机。
转运航天员所用的是一个半躺式的座椅。考虑到寒冷天气对航天员的影响，航天员出舱后将为其添置保暖型睡袋和盖毯。同时重力适应过程由以往的在舱内进行改至在直升机上进行，适应过程需大约80分钟。
在重力适应之后，后送直升机从着陆现场起飞，前往机场，再转运至等候在那里的航天员专机将他们送往北京。
第四个环节：
返回舱处置回收
在航天员进行医监医保程序后，搜救队员会进入返回舱内，将有效载荷尽快取出，移交给相关科研单位。这些有效载荷将随航天员专机一道返回北京。
载荷取出完毕后，搜救队员将对返回舱进行拍照摄像、测量实际落点等，随后将其吊装至专用车辆，运送至着陆场站存放，次日通过专列将其转运至北京。至此，飞船返回搜救任务全部结束。
2020年十一月四级作文【三】
Dear all,
I am writing this letter to express my gratitude to my parents for teaching me to be positive and to be strong. “Educating the mind without educating the heart is no education at all.” is the opinion held by Aristotle. It is the experience of our forefathers, however, it is correct even today, including my parenting.
It is widely acknowledged that parenting, which can also be explained as family education, is of great significance in our character forming and manner acquiring. To be more detailed, setting good examples instead of just giving precepts is the greatest achievement of my parents. They not only taught me to think for the best and prepare for the worst; they taught me how. They not only told me the benefits of being strong in mind; they proved it. All those things require huge amount of time and work, but it’s worth it.
Without my parents’ contribution and education, I would never be who I am now. But most importantly, I would never be more gratitude to them than today.
Yours,
XXX
