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【简答题】
After the pilot is seated in the cockpit and prior to starting the engine, all items and materials to be used on the flight should be arranged in such a manner that they will be readily available and convenient to use. Extra caution should be taken at night to assure the propeller area is clear. Turning the rotating beacon ON, or flashing the airplane position lights will serve to alert persons nearby to remain clear of the propeller. To avoid excessive drain of electrical current from the battery, it is recommended that unnecessary electrical equipment be turned OFF until after the engine has been started. After starting and before taxiing, the taxi or landing light should be turned ON. Continuous use of the landing light with r.p.m. power settings normally used for taxiing may place an excessive drain on the airplane ’ s electrical system. Also, overheating of the landing light could become a problem because of inadequate airflow to carry the heat away. Landing lights should be used as necessary while taxiing. When using landing lights, consideration should be given to not blinding other pilots. Taxi slowly, particularly in congested areas. If taxi lines are painted on the ramp or taxiway, these lines should be followed to ensure a proper path along the route. The before takeoff and runup should be performed using the checklist. During the day, forward movement of the airplane can be detected easily. At night, the airplane could creep forward without being noticed unless the pilot is alert for this possibility. Hold or lock the brakes during the runup and be alert for any forward movement.
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【简答题】空调冷源多采用冷水机组,其供水温度一般为 °C ,回水温度一般为 °C 。
【单选题】下列的指令中,非模态指令是( )。
A.
G01
B.
G02
C.
G03
D.
G04
【简答题】三个电容器如图联接,其中C1=10×10-6F,C2=5×10-6F, C3=4×10-6F,当A、B间电压U=100V时,试求: (1)A、B之间的电容; (2)当C3被击穿时,在电容C1上的电荷和电压各变为多少? (与上题合并一张图片上传,可传至任意题)
【简答题】三个电容器如图联接,其中C1=10×10-6F,C2=5×10-6F, C3=4×10-6F,当A、B间电压U=100V时,试求: (1)A、B之间的电容; (2)当C3被击穿时,在电容C1上的电荷和电压各变为多少?
【判断题】框景的应用过程中,如果观赏点与框之间的观赏视距比较远,则框的尺度可适当小一些,反之则可以放大。
A.
正确
B.
错误
【多选题】铺砌在密实底面材料(如毛石)的砂浆,其强度主要取决于( )两个方面。
A.
水灰比
B.
水泥强度
C.
用水量
D.
水泥用量
【多选题】4-4、计算机网络中主要拓扑结构有: ______。
A.
星型结构
B.
总线结构
C.
环型结构
D.
树型结构
E.
网状结构
F.
混合结构
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A.
董事人数不足公司章程所规定人数的1/2时
B.
公司未弥补的亏损达到实收股本总额的2/3时。
C.
持有公司股份8%的股东李某请求时
D.
监事会主席张某提议召开时
【判断题】框景的应用过程中,如果观赏点与框之间的观赏视距比较远,则框的尺度可适当小一些,反之则可以放大。
A.
正确
B.
错误
【判断题】距离井越远渗流速度越小,但压力梯度越大
A.
正确
B.
错误
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