更多"[单选题] I hurried _____ I wouldn’t be"的相关试题:
[单选题] It was not until late in the evening _____ the traveler found a hotel.
A. which
B. that
C. as
D. where
[单选题] I feel that I can help singers, especially the younger .
A. champion
B. coach
C. guy
D. generation
[填空题] I didn’t tell her the bad news, as I was afraid ( )__ making her sad.
[填空题]I'm sorry I can't say it ( )__ Chinese.
[单选题]已知：i＝100•sin(ωt＋30°)A，t＝0时，i等于( )A。
A.-100
B.86.6
C.-50
D.50
[单选题]已知交流电流解析式i1=60sin(314t+30°)A,i2=60sin(314t+70°)A,i3=60sin(314t-120°)A。则下列答案中正确是
A.i1比i2滞后60°
B.i1比i2超前60°
C.i1与i2同相
D.i3比i1滞后150°
[单选题]已知i1=10sin(314t-900)A,i2=10sin(628t-300)A,则()。
A.i1比i2超前60°
B.i1比i2滞后60°
C.i1比i2超前90°
D.不能判断相位差
[填空题]在正弦交流电i = Im sin(ωt+ψ) 中的角度 ωt 和( ωt +ψ )称为正弦交流电的( )。
[单选题]在音频选择/控制面板上,"R/T-/I/C"电门的"R/T"和"I/C"各表示什么含义?
A.R/T 为按压发话,I/C 为飞行内话
B.R/T 为备用通话方式,I/C 为正常通话方式
C.R/T 为通过发射机选择电门选择的通讯系统进行发话,I/C 为通过飞行内话系统发话
D.R/T 为正常通话,I/C 为飞行内话
[单选题]当t=0.01s时，电流i=10sin314t的值为( )
A.3.14
B.10
C.－10
D.0
[单选题]已知正弦电流的瞬时表达式为i(t)=28.8sin(314t+300)，其电流相量表达式为(____)。
A. I=28.8∠30°A
B. I=20∠30°A
C. I=28.8∠120°A
D. I=28.8∠0°A
[单选题]已知正弦电流的瞬时表达式为i(t)=28.8sin(314t+30°)，其电流相量表达式为(____)。
A.I=28.8∠30°A
B.I=20∠30°A
C.I=28.8∠120°A
D.I=28.8∠0°A
[单选题] 已知交流电压u=Umsin(1000t+70°)V,i=Imsin(1000t+10°)A,则u比i超前
A.40°
B.60°
C.80°
D.50°
[单选题]已知：i=100sin（wt+30°）A，t=0时，i等于（）A。
A.100
B.50
C.57.7
D.86.6
[判断题]I don’t think it’s necessary for us to discuss this question any further.
A.正确
B.错误
[判断题][T]A-E-A-002 3 1 3
高速铁路预制板式无砟轨道分为CRTS I、CRTS II、CRTS III型和道岔区板式四种。
A.正确
B.错误
