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【单选题】
旋转磁场的转速称为同步速度,除与电机磁极对数有关,该速度还与( )有关。
A.
定子电流大小
B.
定子电流频率 f 1
C.
转子频率
D.
端电压
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【多选题】Router R1 and R2 are both configured for HSRP.  Which two statements about the HSRP priorities  of these two routers are true?()
A.
To assign the HSRP router priority in a standby group, the standby group-number priority  priority-value global configuration command must be used.
B.
The default priority of a router is zero (0).
C.
The no standby priority command assigns a priority of 100 to the router.
D.
Assuming that preempting has also been configured, the router with the lowest priority in an  HSRP group would become the active router.
E.
When two routers in an HSRP standby group are configured with identical priorities, the router  with the highest configured IP address will become the active router.
【单选题】创建PCR扩增程序时,哪个温度是随着不同的实验而变化?
A.
变性温度
B.
退火温度
C.
延伸温度
D.
保存温度
【单选题】______ these potential problems, two-way radios are preferable as they are extremely reliable for short distances and can broadcast to several people at once.
A.
Considered
B.
Given
C.
Including
【单选题】PCR反应中变性、复性、扩增温度分别是()。
A.
52℃、72℃、95℃
B.
72℃、52℃、95℃
C.
95℃、52℃、72℃
D.
52℃、95℃、72℃
E.
95℃、72℃、52℃
【单选题】Despite their different approaches, the two talk shows are both ______ .
A.
ironical R. sensitive
B.
instructive
C.
cynical
D.
cynical
【单选题】三相半波可控整流电流,控制角α 为多少(),负载电压的波形临界连续?
A.
B.
30°
C.
60°
D.
90°
【多选题】Refer to the exhibit.which two statements about router R1 are true?(choose two)
A.
the router has two EIGRP neighbors and one OSPF neighbor
B.
at least two IGP routing protocols are running on the router
C.
at least three IGP routing protocols are running on the router
D.
the router is learning external OSPF and EIGRP routes
E.
the router has an OSPF Area 0 adjacency with the device at 10.82.4.42
【简答题】It is desired to just resolve (R=1.5) two gas-chromatographic peaks with retention times of 85s and 100s, respectively, using a column that has an H value of 1.5 cm/plateunder the operating conditions...
【简答题】Wash Co assembles and sells two types of washing machines – the Spin (S) and the Rinse (R). The company has two divisions: the assembly division, and the retail division. The company’s policy is to tr...
【多选题】所谓关键的质量是( )。
A.
关键的产品
B.
关键的零部件
C.
关键的控制点
D.
关键的质量特性
E.
关键工序
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