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【单选题】
About the venous blood pressure, which of the following statement is NOT true?( )A.
When standing, intracranial venous sinus blood pressure can be lower than atmospheric pressure.
B.
When arterial blood pressure decreases, central venous pressure will also decrease.
C.
When cardiac ejection capacity is weakened, central venous pressure increases.
D.
When standing still, dorsal pedal venous pressure can reach about 90mmHg.
E.
When walking, dorsal pedal venous pressure is lower than when standing still.
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【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】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】病毒性肺炎和支原体肺炎的共同特点是()
A.
病变主要发生在肺间质
B.
易发生出血性肺炎
C.
肺泡表面易形成透明膜
D.
上皮细胞可融合成巨细胞
E.
以中性粒细胞浸润为主
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