更多"Possible phase relationships betwee"的相关试题:
[单项选择]The output voltage of a three-phase alternator is regulated by the （）.
A. AC voltage to the armature
B. AC voltage to the field
C. DC voltage to the armature
D. DC voltage to the field
[单项选择]中兴通讯HSDPA商用分为两个阶段，Phase I和Phase II，2005年10月实现Phase I，Phase I的峰值速率是（）。
A. 10.8Mbps
B. 14.4Mbps
C. 7.2Mbps
D. 3.6Mbps
[单项选择]The correct phase rotation of a three-phase alternator can be checked with a（）
A. dynamometer
B. power factor meter
C. three-phase motor
D. polyphase voltmeter
[多项选择]中兴通讯HSDPA商用分为Phase I和Phase II阶段，属于Phase I阶段的特点的是（）。
A. 已经取得了业界瞩目的进展，支持多用户调度，单小区可以支持64个用户调度。
B. 支持与R99共享载频和独立载频两种建网方式。
C. 通过调度算法，中兴通讯HSDPA已经实现对单用户分配15码道，从而使单用户/单小区最高下行峰值速率达到了10.8Mbps这一业界领先水平。
D. 通过调度算法，中兴通讯HSDPA已经实现对单用户分配15码道，从而使单用户/单小区最高下行峰值速率达到了14.4Mbps这一业界领先水平。
[单项选择]An efficient seal between the cylinder block and cylinder heads on many diesel engines is obtained with（）
A. graphite packing
B. sealing compound
C. lubricating oil
D. gaskets
[单项选择]In a three-phase circuit, the phase voltages are （）
A. 120°apart
B. 160°apart
C. 180°apart
D. 360°apart
[单项选择]The pressure range between the system cut in and cut out pressures in a refrigeration unit is known as（）
A. opposing operational drag
B. pressure distribution
C. differential
D. system purge
[判断题]phase1和phase2的手机都要收听并使用系统消息7/8。
[单项选择]Phase I and Phase II DMVPN differ in terms of which of these characteristics？（）
A. Utilization of spoke-to-spoke dynamic tunnels
B. Utilization of multipoint GRE tunnels at the hub site
C. Utilization of hub-to-spoke dynamic tunnels
D. Support for multicast
[单项选择]C／P means：Charter--Party that is made between（）.
A. the Charterer and the Party
B. the Charterer and the Shipowner
C. the Charterer and the Cargoowner
D. the Charterer and the Shipper
[名词解释]额定电压（rated voltage）
[名词解释]标称电压（nominal voltage）
[名词解释]接触电压（touch voltage）
[名词解释]故障电压（fault voltage）
[单项选择]（）的英语是voltage。
A. 电压
B. 电阻
C. 电流
D. 电器
[单项选择]A phase correction may be applicable to correct the sextant altitude correction of（）.
A. any star
B. the Sun
C. third magnitude stars only
D. some planets
[单项选择]When the voltage remains constant and the resistance is increased in a series circuit, the flow of current （）
A. increases by the square of the original value
B. increases
C. remains the same
D. decreases
[单项选择]Generators should have an excitation/voltage regulation system which will enable them to share the steady state reactive load （） no machine exceeds its proportional share of reactive load by more than 10% of the rated reactive load of the largest generator.
A. when
B. so as
C. such that
D. though
