A: modulate
B: removal
C: superficial
举一反三
- 在三相交流电路中,三相相电压分别是uA=UmsinωtV,uB=Umsin(ωt-120°)V,uC=Umsin(ωt+120°)V,若u=uB+uC,则u为 A: u=2UmsinωtV B: u=UmsinωtV C: u=Umsin(ωt-180°)V D: u=2Umsin(ωt+180°)V
- "—Would you please turn off[u] [/u]TV?—OK, just a moment." 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: a B: an C: the D: /
- The bill is for [u] [/u] . A: meal B: Internet C: cable TV D: electricity
- 我国照明电路使用交流电，电压有效值是220V，频率是50Hz，这交流电的电压表达式是（）。 A: u=220sin50tV B: u=220sin110πtV C: u=311sin50tV D: u=311sin110πtV
- Please [u] [/u] the key words and phrases. A: underline B: underlining C: underlined
内容
- 0
[u] [/u], his idea was accepted by all the people at the meeting. A: Strange as might it sound B: Strange as it might sound C: As it might sound strange 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案', 'isMemberControl': 0, 'type': 181}
- 1
The problems are difficult to solve. Please give me [u] [/u]. A: some advices B: an advice C: advices D: some advice
- 2
已知，交流电压u1＝10sin100πtV，u2＝10sin(100πt－60°)V。则u＝u1－u2的解析式为（）。 A: u＝10sin(100πt＋60°)V B: u＝10sin(100πt－60°)V C: u＝8sin(100πt＋30°)V D: u＝8sin(100πt－30°)V
- 3
已知,交流电压U1=10sin100πtV,U2=10sin(100πt-60°)V,则u=u1-u2的解析式为() A: U=10sin（100πt+60°）V B: U=10sin（100πt-60°）V C: U=8sin（100πt+30°）V D: U=8sin（100πt-30°）V
- 4
How did Maya feel about being on TV? A: She felt eager to be on TV. B: She felt urged to be on TV. C: She felt frightened to be on TV. D: She felt surprised to be on TV.