【简答题】如图 所示, 不计滑轮重和摩擦 ,当分别用力匀速提起物体时,拉力 F 1 = F 2 ,则物体 C 与 D 的重力关系为 G C______ G D (选填“大于”、“等于”或“小于”)。 滑轮 ________ 可以看作省力杠杆(选填“ A ”或“ B ”)。 若两物体上升速度相同,则以物体 C 为参照物,物体 D 是 _________ 的(选填“运动”或“静止”)。
【单选题】According to the law of supply,
A.
producers are willing to supply larger amounts of a good as its price increases.
B.
the price of a good is directly related to the amount buyers choose to buy.
C.
the price of a good is inversely related to the amount buyers wish to buy.
D.
an inverse relationship between the price of a good and the amount producers supply.
【单选题】Which of the following demonstrates the law of supply?
A.
When leather became more expensive, belt producers decreased their supply of belts.
B.
When car production technology improved, car producers increased their supply of cars.
C.
When sweater producers expected sweater prices to rise in the near future, they decreased their current supply of sweaters.
D.
When lemon prices rose, lemon growers increased their quantity supplied of lemons.
【判断题】变压器电压高的一侧电流比电压低的一侧电流小。
【单选题】(2018)支原体性肺炎和病毒性肺炎的共同特点是( )
【单选题】The law of supply implies that .
A.
there is a positive or direct relationship between price and quantity supplied
B.
the supply curve slopes upward
C.
as the price of the product increases, the quantity supplied increases
D.
all of these correctly state the law of supply
【单选题】支原体性肺炎和病毒肺类的共同特点是答案:
B.
上皮细胞增生融合成巨细胞D.肺泡表面容易形成透明膜