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【单选题】
由计算公式不准确、测量方法选择不当、工件安装与定位不正确、测量基准选择不当等产生的测量误差属于 () 。A.
测量器具的误差
B.
测量方法误差
C.
环境条件引起的误差
D.
测量人员引起的误差
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【单选题】The angle measured eastward from the vernal equinox along the celestial equator often expressed in time units is the ().
A.
Greenwich sidereal time
B.
Right ascension
C.
Local sidereal time
D.
Sidereal hour angle
【简答题】The name England comes from the words “Angle land”．The Angles were people who came from northern Germany in the 5th and 6th centuries，after the Romans had left.The French name for England is Angleterr...
【简答题】情景对话（5分） A: Do you have a new friend? B: _____ 小题1: _____. A: What’s her name? B: Her name is Jane. A: ____ 小题2: _____ B: She is from Canada. A: Wh...
【单选题】______ conveys a signal of desired rudder angle from the bridge and activates the power unit and transmission system unit the desired angle is reached.
A.
The control equipment
B.
The power unit
C.
The transmission system
D.
The follow-up mechanism
【单选题】(Looking) from (another) angle, the painting (would) show (something different).
A.
Looking
B.
another
C.
would
D.
something different
【简答题】阅读理解 The name England comes from the words 'Angle land'. The Angles were people who came from northern Germany in the 5th and 6th centuries, after the Romans had left.The French name for England is An...
【单选题】—I would like to pick up your sister for you. But I don’t know her. _____? —A middle-aged woman with a round face, wearing a red blouse.
A.
How about your sister
B.
What do you think of your sister
C.
What is your sister like
D.
What does your sister do
【单选题】The required rudder angle is transmitted hydraulically or electrically from the steering wheel at the bridge to the ______ at the steering gear, just above the rudder.
A.
transmitter
B.
tele-motor
C.
hydraulic ram
D.
hydraulic cylinder
【简答题】密封润滑良好、连续运转的滚动轴承的主要失效形式是 ________ _ __ 和 ___________ 。对于不转、转速极低或摆动的轴承,常发生 ___________ 失效。
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