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【简答题】
正弦交流电的三要素是 、 和 。我国工业及生活中使用的交流电频率为 Hz,周期为 S。 角频率为 rad/s
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举一反三
【单选题】When I asked for a 50% discount, the salesman told me to ______________.
A.
get ahead
B.
get real
C.
get carried away
【简答题】压缩模按模具的()分为溢式压缩模、不溢式压缩模、半溢式压模。 A导向方式 B固定方式 C加料定形式 D安装形式
【单选题】When I asked for the remote control my little brother tightened his ___________ on it and wouldn't give it to me.
A.
fist
B.
grip
【单选题】When I asked for the channel hopper my little brother tightened his ______ on it and wouldn’t give it to me.
A.
fist
B.
cling
C.
grip
D.
force
【简答题】I _______________________ at the party when I asked for a glass of wine. It was soft drinks only!
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