皮皮学,免费搜题
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The National Beekeeping Centre Wales is a free attraction in the countryside that teaches children about the importance of honeybees – with the chance to try lots of local honeys. This friendly visitor centre is a supporter of Welsh honeybees, which are increasingly under threat from climate change and loss of wildflower meadows ( 草地 ). It raises visitors’ awareness of environmental issues and shows the 4,000-year history of beekeeping and honey-making, from the ancient Egyptians to the Romans. A Hive ( 蜂巢 ) Aid scheme lets you adopt a beehive, and regular courses (from £60 per person) train new generations of beekeepers. Fun fact Bees pollinate ( 授粉 ) about a third of everything we eat and play an important ole in sustaining ( 维持 ) our ecosystems. In economic terms, honeybee pollination could be worth up to £200m to the UK alone. What about lunch? Next door is the Furnace Tearoom, part of the Bodnant Welsh Food Centre, which serves light bites – wraps ( 卷饼 ), fruit salads (£7) and coffee. The nearby Pavilion Restaurant at the National Trust’s Bodnant Garden has cooked food, including baked potatoes (£5) and daily specials such as local casseroles ( 炖菜 ) with bread rolls (£6), plus coffee and cakes. Exit through the gift shop There is a range of bee-themed gifts in our gift shop, including bee toys (£2), wooden honey candy (£2) and a selection of honeys all made by Welsh producers (£5). The bestselling Bodnant honey (£8) goes fast. Getting here We are located just off the A470 on the Bodnant Estate in the Conwy Valley, and 10 minutes from the A55 north Wales coast road. Follow the brown signs just after Bodnant Gardens . Value for money Visits and activities for kids are free, though donations are welcome. Taster days (from £60) and the weekend beekeeping course (£80 per person) are held at Abergwyngregyn village, 10 miles west down the A55. Opening hours The Visitor Centre opens daily from 10 am-4 pm but it is volunteer-run, so phone ahead to check. Expect lots of fun activities around the annual Conwy Honey Fair.
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举一反三
【单选题】关于电感的下列说法,错误的是( )
A.
电感两端的电压不通报跃变
B.
电感中的电流不能跃变
C.
电感中的磁链不能跃变
D.
当电感的电压uL与电流iL的正方向取得一致时,则有
【多选题】车身结构中有哪些类型的钢板。
A.
热轧钢板
B.
冷轧钢板
C.
高温轧钢板
D.
低温轧钢板
【单选题】吡哆醇、吡哆醛及吡哆胺都具有--的生物学活性。
A.
维生素A
B.
维生素B 6
C.
维生素D
D.
维生素B 1
【单选题】关于电感的下列说法,错误的是( )。
A.
电感在稳态电路中相当于短路
B.
电感是耗能元件
C.
电感是储能元件
D.
电感中的电流不能突变
【单选题】关于电感的下列说法,错误的是______。
A.
由于实际中没有无穷大功率电源,实际电感两端的电压不能跃变
B.
由于实际中没有无穷大功率电源,实际电感中的电流不能跃变
C.
由于实际中没有无穷大功率电源,实际电感中的磁链不能跃变
D.
若电感L上的电压uL、电流iL的参考方向相同,则有关系式:
【判断题】晒青毛茶的制造工艺是:鲜叶→萎凋→揉捻→晒干。
A.
正确
B.
错误
【单选题】关于电感的下列说法,错误的是()。
A.
由于实际中没有无穷大功率电源,实际电感两端的电压不能跃变
B.
由于实际中没有无穷大功率电源,实际电感中的电流不能跃变
C.
由于实际中没有无穷大功率电源,实际电感中的磁链不能跃变
D.
若电感L上的电压uL、电流iL的参考方向相同
【判断题】《四季歌》在影片中几次出现,但是场景不同,意味也完全不同。
A.
正确
B.
错误
【单选题】关于电感下列说法错误的是:
A.
电感元件反应了电流产生磁通和磁场能量储存的物理现象
B.
电感的单位为H
C.
电感元件电压和电流的关系为:
D.
电感是一个非记忆元件
【单选题】关于电感的下列说法,错误的是______。
A.
由于实际中没有无穷大功率电源,实际电感两端的电压不能跃变
B.
由于实际中没有无穷大功率电源,实际电感中的电流不能跃变
C.
由于实际中没有无穷大功率电源,实际电感中的磁链不能跃变
D.
若电感L上的电压uL、电流iL的参考方向相同,则有关系式:uL=LdiL/dt
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