They seve _______ food i his esaua.
They serve _______ food in this restaurant.castle|glue|delicious|wing正确答案:delicious...
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They serve _______ food in this restaurant.castle|glue|delicious|wing正确答案:delicious...
I am a waiter in an Italian restaurant. I often get good _______ (小费) from my customers because of my good service.正确答案:...
A busy shopping center is usually a good location for a restaurant.繁忙的商业中心通常也是为了餐厅的好地方。|为了餐厅繁忙的商业中心通常也是好地方。|繁忙的商业中心通常也是开...
This dress ________ you well. You look pretty.adapt|adapts|fit|fits正确答案:fits...
You look good in that dress.That’s fine.|Thanks|You are welcome|I know正确答案:Thanks...
Believe it or not!You look great ___ the red coat!at|on|in|as正确答案:in...
Where is the fitting room I’d like to ___________.正确答案:try it on...
Where is the fitting room I’d like to ___________.try on it|try it on|put on it|put it on正确答案:try it on...
[音频]I would like to book a double room.正确答案:I would like to book a double room....
Do you know where_______ nowhe lives|does he live|he lived|did he live正确答案:he lives...
Do you know where the station ____(be)正确答案:is...
Do you know where the正确答案:...
Panspermia ______________ that primitive life might once have been carried between the planets of the solar system.doubt...
There are eight ________ in the solar system. They are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptun...
As a school boy I already knew the sun (be) the center of the solar system.正确答案:is...
I decided to ___________ as a waiter in a resaurant during my summer vacation.serve|turn|take|make正确答案:serve...
Is this the school ______ you worked during the summer vacationthat|which|in which|when正确答案:in which...
Is this the school ______ you worked during the summer vacation正确答案:in which...
Look!They (play)________ the basketball on the playground.正确答案:are playing...
Tom was strong in swimming. He is good at basketball, too.Tom is strong in swimming, good at...
3、Tom wanted to play football with his friends in the street, but his father told him_. 正确答案:not to...
She to work when the telephone rang.正确答案:was about to go...
_____gotintotheroom_____thetelephonerang.Hehardlyhad;then|Hardlyhadhe;when|Hehadnot;then|Nothadhe;when正确答案:Hardlyhadhe;w...
He ________ into the office building when the fire bell rang.goes|has gone|was going|is going正确答案:was going...
时序逻辑电路包括组合逻辑电路和存储电路正确答案:对...
中国大学MOOC: 分析下图所示逻辑电路。假定电路初始状态为“000”,下列描述正确的有( )。【图片】正确答案:这是一个Moore型的同步时序逻辑电路。\n电路存在无效状态,具有自启动功能。...
下图所示为某组合逻辑电路的输入A、B和输出Y的波形,该逻辑电路的逻辑式应为()。ebe3a10c056aef4f8e7977d79e0fc99f.png正确答案:C...
三相对称负载接在三相电源上,若各相负载的额定电压等于电源线电压,负载应作 连接。星形|三角形|开口三角形|双星形正确答案:三角形...
对称三相负载星形连接,电源线电压为380V,负载为纯电阻R=10Ω,每相负载的相电流为 A,线电流 A。正确答案:22|22...
不对称三相负载,每相绕组额定电压220V,对称三相电源线电压380V,三相绕组应采用( )。星形联结带中线|三角形联结|星形联结不带中线|不确定正确答案:星形联结带中线...
三相异步电动机铭牌上的额定功率是指三相异步电动机额定运行时,______。A.输入的三相电功率定、转子铁损|电磁功率|轴上输出的机械功率正确答案:轴上输出的机械功率...
异步电动机按( )可分为单相异步电动机和三相异步电动机。 A.结构 B.定子绕组的组数 C.容量 D.转子的组数 正确答案:正确答案:B...
三相异步电动机,YB为异步电动机。正确答案:第一空:防爆型...
一台三相异步电动机,其铭牌上标明额定电压为220\/380V,其接法应是 。Y\/△|△\/Y|△\/△|Y\/Y正确答案:△\/Y...
三相异步电动机的额定功率 =8kW,UN=380 V,cosΦN=0.85,η=0.8,可推算额定电流IN______。17.9A|26A|10.3A|31a正确答案:17.9A...
关于三相异步电动机铭牌标注“电压380\/220V,接法Y\/Δ”说法正确的是() A.电源电压380V时,电机接法为Y B.电源电压220V时,电机接法为Y C.电源电压380V时,电机接法为Δ D.电源电压220V时,电机接法为Δ正确答...
运算放大器的输入级都采用差动放大。正确答案:正确...
运算放大器是()多级放大器。阻容耦合|互感耦合|变压器耦合|直接耦合正确答案:直接耦合...
B.运算放大器的输入电流C.大家的习惯|D.容易得到的电阻阻值|E.电阻的稳定性|F:是否容易受到干扰正确答案:答案:...
发生并联谐振时,电路具有哪些特征答:电路发生并谐时,电路中电压电流同相,呈纯电阻性,此时电路阻抗最大,总电流最小,在L和C支路上出现过电流现象。已读正确答案:已读...
线圈与电容并联的电路发生并联谐振,若线圈支路的电流是10A,总电流8A,则电容支路的电流是 A。18|2|6|10正确答案:6...
电感线圈和电容器并联的电路发生谐振时,其支路电流有可能大于电路总电流。正确答案:正确...
把额定电压为220V的灯泡接在110V电源上,灯泡的功率是原来的()。A.1\/2B.1\/4C.1\/8正确答案:B...
额定电压为220V的灯泡接在110V电源上,灯泡的功率是原来的( )。2|4|1\/2|1\/4正确答案:1\/4...
额定电压为220V的灯泡接在110V电源上,灯泡的功率是原来的()。正确答案:...
一个无源二端网络的戴维南等效电路是什么?求有源二端网络得戴维南等效电阻时,电源该如何置零?正确答案:是一个等效电阻(也是无源二端网络的输入电阻) 电压源被短路,电流源被断路...
戴维南等效电路是指一个电阻和一个电压源的串联组合,其中电阻等于原有源二端网络除源后的等效电阻,电压源等于原有源二端网络的____电压。正确答案:开路...