更多"[单选题] Areas enclosed by a long and "的相关试题:
[单选题] Areas enclosed by a long and short dashed magenta line indicate ______．
A.Cable areas
B.Dumping grounds
C.Fish trap areas
D.Precautionary areas
[单选题] The short-long dashed，magenta lines parallel to York River Entrance Channel mark ______．
A.fish trap areas
B.naval exercise areas
C.underwater cables
D.recommended track lines
[单选题] 某晶体管的发射极电流等于2mA,集电极电流等于1.8 mA,则它的基极电流等于( )mA。
A.0.8
B.3.8
C. 0.2
D.0.02
[填空题]人体安全电流值是工频交流（）mA。直流50mA。
[单选题] NR中Long BSR/Long Truncated的MAC CE包含几个bit
A.4
B.6
C.8
D.12
[单选题] NR中Long Truncated/Long BSR的MAC CE包含几个bit
A.2
B.4
C.6
D.8
[单选题] The variation for most given areas undergoes ______ change，the amount of which is also noted on charts．
A.an annual
B.a constant
C.a variable
D.an unstable
[多选题]测量电源漏流直流一般不大于（）mA。交流一般不大于（）mA
A.1
B.10
C.20
D.30
[单选题] A vessel navigate in areas near the termination of traffic separation schemes shall do ______ with particular caution．
A.it
B.that
C.this
D.so
[判断题] DC600V单车漏电电流≤100mA。AC380V单车漏电电流≤150mA。( )
A.正确
B.错误
[单选题]绝缘油击穿电压测试项目要求:升压变压器及相关电路的短路电流在( ) mA~25 mA
A. 5
B. 10
C. 15
D. 20
[单选题]1000kV变压器接地电流大于（）mA应予注意，其他电压等级的变压器接地电流大于100mA时应予注意。
A.150
B.200
C.250
D.300
[单选题]1000kV变压器接地电流大于300mA应予注意，其他电压等级的变压器接地电流大于（）mA时应予注意。
A.50
B.80
C.100
D.120
[单选题] 电-气阀门定位器将( )mA或0-10mA控制信号转化为相应气压进行工作。
A.4-20
B.4-10
C.5-20
D.4-16
[判断题]摆脱概率99.5%时,成年男性和成年女性的摆脱电流约为9mA和6mA。 ( )
A.正确
B.错误
[判断题][877]( )在用万用表直流 3mA 挡测量直流电流,指针在 100,则电流为
100mA。
A.正确
B.错误
