【单选题】
You had better ___ a doctor as soon as possible.
A. seeing
B. saw
C. see
D. seen
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相关试题
【单选题】
The boy is not happy at the new school. He has ___ friends there.
A. few
B. a few
C. little
D. a little
【单选题】
I fell and hurt myself while I ___ basketball yesterday.
A. was playing
B. am playing
C. play
D. played
【单选题】
Tom ___ more than twenty pounds on the novel.
A. spent
B. paid
C. cost
D. took
【单选题】
Don't forget ____ the window before leaving the room.
A. to have closed
B. to close
C. having closed
D. closing
【单选题】
Twenty people were___ wounded in the air crash.
A. quickly
B. wrongly
C. bitterly
D. seriously
【单选题】
The top of the Great Wall is ___ for five horses to go side by side.
A. wide
B. so wide
C. wide enough
D. enough wide
【单选题】
We’ve missed the last bus. I'm afraid we have no ___but to take a taxi.
A. way
B. choice
C. possibility
D. selection
【单选题】
Nancy is considered to be ____ the other students in her class.
A. less intelligent
B. the most intelligent
C. intelligent as well
D. as intelligent as
【单选题】
It's _____ that he was wrong.
A. clearly
B. clarity
C. clear
D. clearing
【单选题】
There ____ a book and some magazines on the desk.
A. is
B. be
C. have
D. has
【单选题】
She is not only my classmate _____ also my good friend.
A. or
B. but
C. and
D. too
【单选题】
He asked the waiter ___ the bill.
A. on
B. of
C. for
D. after
【单选题】
_____ you are leaving tomorrow, we can have dinner together tonight.
A. Since
B. While
C. For
D. Before
【单选题】
I would like to do the job ___ you don't force me to study.
A. in case
B. although
C. though
D. as long as
【单选题】
The reason I did not go abroad was ___ a job in my home town.
A. because
B. due to
C. that I got
D. because of getting
【单选题】
_____ she survived the accident is miracle.
A. What
B. That
C. As
D. Which
【单选题】
I often see ____ the road on his way home.
A. he cross
B. him cross
C. him crossed
D. he crossing
【单选题】
His mother _______ alone since his father died.
A. lived
B. lives
C. has lived
D. is living
【单选题】
The workers are busy _____ models for the exhibition.
A. to make
B. with making
C. being making
D. making
【单选题】
It was well known that Thomas Edison _______ the electric lamp.
A. discovered
B. invented
C. found
D. developed
【单选题】
She wonders ____ will happen to her private life in the future.
A. that
B. it
C. this
D. what
【单选题】
The higher the temperature, _____ the liquid evaporates.
A. the faster
B. the more fast
C. the slower
D. the more slower
【单选题】
Australia is one of the few countries ______ people drive on the left of the road.
A. which
B. that
C. where
D. on which
【单选题】
Sunday is the day ____ people usually don't go to work.
A. when
B. which
C. in which
D. that
【单选题】
____ you know, David has been well lately.
A. Which
B. As
C. What
D. When
【单选题】
The harder you study, _____ you will learn.
A. much
B. many
C. the more
D. much more
【单选题】
They got there an hour _____ than the others.
A. early
B. much early
C. more early
D. earlier
【单选题】
The grey building is the place where the workers live, and the white building is the place where the spare parts ____ .
A. are producing
B. are produced
C. produced
D. being produced
【单选题】
Once environmental damage ______, it takes many years for the system to recover.
A. is to do
B. does
C. had done
D. is done
【单选题】
We worked hard and completed the task ___.
A. in the time
B. on the time
C. ahead of time
D. before time
【单选题】
I didn't expect you to turn _____ at the meeting yesterday.
A. up
B. to
C. out
D. over
【单选题】
I like the teacher _______ classes are very interesting and creative.
A. which
B. who
C. whose
D. what
【单选题】
When Lily came home at 5 p. m. yesterday, her mother ______ dinner in the kitchen.
A. cooked
B. was cooking
C. cooks
D. has cooked
【单选题】
I don’t know the park, but it's _____ to be quite beautiful.
A. said
B. told
C. spoken
D. talked
【单选题】
Mike is better than Peter ____. swimming.
【单选题】
The young lady coming over to us ______ our English teacher; the way she walks tells us that!
A. must be
B. can be
C. would be
D. could be
【单选题】
Eggs, though rich in nourishments, have ______ of fat.
A. a large number
B. the large number
C. a large amount
D. the large amount
【单选题】
Neither John ______his father was able to wake up early enough to catch the morning train.
A. nor
B. or
C. but
D. and
【单选题】
Jane's dress is similar in design ______ her sister's.
A. like
B. with
C. to
D. as
【单选题】
His salary as a driver is much higher than ________.
A. a porter
B. is a porter
C. as a porter
D. that of a porter
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【单选题】
在融合空域3000米以下运行的Ⅺ类无人机驾驶员，应至少持有：___
【单选题】
超低空无人机任务高度一般在_____之间___
A. 0~100m
B. 100~1000m
C. 0~50m
【单选题】
无人机系统飞行器平台主要使用的是_____空气的动力驱动的航空器___
【单选题】
_____航空器平台结构通常包括机翼、机身、尾翼和起落架等___
【单选题】
民用无人机驾驶员管理规定里，Ⅲ类无人机空机质量是：___
A. 1.5＜W≤4 kg
B. 4＜W≤15 kg
C. 15＜W≤116 kg
【单选题】
超近程无人机活动半径在_____以内 ___
A. 15—50km
B. 15km
C. 50—200km
【单选题】
近程无人机活动半径在：___
A. 200—800km
B. 15—50km
C. 15km
【单选题】
目前主流的民用无人机所采用的动力系统通常为活塞式发动机和_____两种___
【单选题】
活塞发动机系统常采用的增压技术主要是用来：___
【单选题】
电动动力系统主要由动力电机、动力电源和_____组成___
【单选题】
多旋翼动力电池充电尽量选用：___
A. 平衡充电器
B. 便携充电器
C. 快速充电器
【单选题】
多旋翼动力系统主要使用： ___
A. 四冲程发动机
B. 有刷电机
C. 无刷电机
【单选题】
不属于无人机飞控子系统所需信息的是：___
【单选题】
不属于无人机飞控计算机任务范畴的是：___
A. 数据中继
B. 姿态稳定与控制
C. 自主飞行控制
【单选题】
无人机通过_____控制舵面和发动机节风门来实现无人机控制___
【单选题】
无人机电气系统中电源和______两者组合统称为供电系统___
【单选题】
无人机搭载任务设备重量主要受限制于：___
【单选题】
无人机配平的主要考虑是___沿纵轴的前后位置 ___
【单选题】
指挥控制与____是无人机地面站的主要功能___
【单选题】
无人机地面站系统不包括：___
A. 机载电台
B. 无人机控制站
C. 载荷控制站
【单选题】
无人机地面站显示系统应能显示______信息___
A. 无人机飞行员状态
B. 飞行器状态及链路、载荷状态
C. 飞行空域信息
【单选题】
地面站地图航迹显示系统可为无人机驾驶员提供飞行器______等信息___
【单选题】
无人机在增稳飞行控制模式下，飞控子系统______控制___
【单选题】
无人机系统通讯链路主要包括：指挥与控制（C、&C、），______ ，感知和规避（S&A、）三种___
A. 空中交通管制（ATC）
B. 电子干扰
C. 无线电侦察
【单选题】
目前世界上无人机的频谱使用主要集中在UHF、L和______波段 ___
【单选题】
以下不是导航飞控系统组成部分的是：___
【单选题】
导航子系统功能是向无人机提供_____信息，引导无人机沿指定航线安全、准时、准确的飞行___
A. 高度、速度、位置
B. 角速度
C. 角加速度
【单选题】
______是无人机完成起飞、空中飞行、执行任务、返场回收等整个飞行过程的核心系统，对无人机实现全权控制与管理，因此该子系统之于无人机相当于驾驶员之于有人机，是无人机执行任务的关键。___
A. 飞控计算机
B. 飞控子系统
C. 导航子系统
【单选题】
飞控子系统必须具备的功能为：___
A. 无人机姿态稳定与控制，无人机飞行管理，应急控制
B. 无人机飞行管理，与导航子系统协调完成航迹控制，信息收集与传递
C. 无人机起飞与着陆控制，无人机飞行管理，信息收集与传递
【单选题】
飞控子系统可以不具备如下功能：___
A. 姿态稳定与控制
B. 导航与制导控制
C. 任务分配与航迹规划
【单选题】
无人机电气系统一般包括____3个部分___
A. 电源、电缆、接插件
B. 电源、配电系统、用电设备
C. 电缆、供电系统、用电设备
【单选题】
____两者组合统称为供电系统___
A. 电缆和配电
B. 电源和电缆
C. 电源和配电
