【单选题】男の人が忘れた帽子はどこにありますか。 san.mp3:
【单选题】单相变压器一次、二次额定电压为220V/36V,容量SN=2KV.A,如果二次侧连接上36V、100W的15盏灯,此时二次侧的电流是:
【单选题】We ________ 3000 words by the end of this term.
【单选题】The word “pitch” in the term “an elevator pitch” means ______.
A.
the action or manner of throwing something
B.
abrupt up-and-down motion (as caused by a ship or other conveyance)
C.
talk or arguments a person uses to persuade people to do or buy something
D.
the property of sound that varies with variation in the frequency of vibration
【单选题】The term “ offer ” in contract law means ____________.
【单选题】有永久性顶盖和围护设施的架空通廊的建筑面积按结构底板水平面积的()计算
【单选题】单相变压器一次、二次额定电压为220V/36V,容量SN=2KV.A,则一次、二次侧的额定电流分别是: