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【单选题】
By the early 1760s, the ________ colonies in North America were ready to separate themselves from Great Britain.A.
13
B.
14
C.
11
D.
12
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举一反三
【简答题】冥探孔佛之精奥,会通群哲之心法。
【单选题】下列关于喉口的说法正确的是
A.
由会厌上缘、杓会厌襞和杓状软骨围成
B.
吞咽时喉随咽上提,会厌封闭喉口
C.
喉口上方与口咽部相通
D.
向下与声门下腔直接相通
E.
喉口上方与鼻咽部相通
【简答题】我打算学英语了。
【简答题】biological membrane
【简答题】membrane asymmetry
【多选题】How is membrane potential created?
A.
The membrane potential results from a thin (<1 nm) layer of ions close to the membrane, held in place by their electrical attraction to oppositely charged ions on the other side of the membrane.
B.
When there is an exact balance of charges on either side of the membrane, there is no membrane potential.
C.
When ions of one type cross the membrane, they establish a charge difference across the two sides of the membrane that creates a membrane potential. The number of ions that must move across the membrane to set up a membrane potential is a tiny fraction of all those present on either side.
D.
In the case of the plasma membrane in animal cells, for example, 6,000 K + ions crossing 1 μm 2 of membrane are enough to shift the membrane potential by about 100 mV; the number of K + ions in 1 μm 3 of cytosol is 70,000 times larger than this.
【单选题】下列关于喉的说法正确的是( )
A.
位于颈前部中份,下方为喉咽
B.
既是呼吸道之一,又是发音器官
C.
喉软骨均为单块的
D.
可分喉前庭和固有喉腔2部
E.
甲状软骨上角的上端称喉结
【单选题】下列关于喉腔的说法正确的是( )
A.
前庭襞位于声襞下方
B.
喉中间腔向两侧延伸至喉室,为喉腔分部中容积最大的一部
C.
前庭裂为喉腔之最狭窄处
D.
声门下腔粘膜下组织较疏松
E.
前庭壁即声带
【简答题】名词解释:消费者偏好、边际效用、基数效用论、序数效用论
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