皮皮学，免费搜题
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【单选题】
某三相异步电动机铭牌上标注其额定功率为176kW，额定频率为50Hz，额定电压为380V。已知其额定效率为92%，则该电动机的输入功率约为( )kW。A.
176
B.
191.30
C.
229.56
D.
316.80
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皮皮学刷刷变学霸
举一反三
【简答题】The hat suits you very well． A) Sorry, I don't know. B) Thank you. C) It's OK. D) I like it.
【单选题】( )一般大于1:1万,属于超大比例尺,制图对象一般为“土地点”,甚至可细到“土地点”的组成部分。
A.
勘测性比例尺
B.
踏勘性比例尺
C.
半详细比例尺
D.
集约比例尺
【单选题】Speaker A．. I like your sweater. It suits you very well. Speaker B: _________It's a present from my girlfriend. Speaker A: She certainly has the taste. A． Want to know how come?
B.
I like it so much.
C.
Thank you for saying it.
D.
You may take it.
【单选题】水分活度等于在同一温度下,食品中水分所产生的蒸汽压与纯水蒸气压的比率。在一定温度下食品与周围环境处于水分平衡状态时,食品中的水分活度值在数值上等于百分率表示的相对湿度,其数值在()之间。
A.
-1~1
B.
-1~0
C.
0~1
D.
0~100
【单选题】That's a nice coat and the color suits you well, so I think it is worth _____. [ ]
A.
to buy
B.
buying
C.
being bought
D.
to be bought
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