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【单选题】
产生电位和动作电位(去极和复极过程)的跨膜离子移动过程属于A.
单纯扩散
B.
载体中介的扩散
C.
通道中介的扩散
D.
主动转运
E.
入胞
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【简答题】WRITING [45 MINJ I t was re c e ntly reported in a newspaper th at six students who shared a dorm at a local u n ive r sity hired a cleaner to do laundry and cleaning once a week.And each of them paid...
【简答题】In the laundry room:Mrs. Anderson: Mike, can you come over here, please?Mike: Sure, Mom. What is it?Mrs. Anderson: (1) ________________ shirt is this?Mike: I don't know. It must be (2) _______________...
【简答题】pH=9.0的含有5.0 ́ 10 -2 mol · L -1 NaCN和1.0 ́ 10 -2 mol · L -1 Hg(NO 3 ) 2 的溶液中,叙述CN - 的物料平衡方程式正确的是------------ × ( ) [
HCN 的p K a
= 9.21 , 生成Hg(CN) 4 2- 络合物]A. [ CN - ] + 4[ Hg(CN) 4 2- ]
= 5.0 ´ 10 ...
【简答题】曲线 在拐点处的切线方程是 .
【单选题】The burning of fuel oil in a diesel engine having a high sodium content, will cause ＿.
A.
corrosion and grooving of exhaust valves
B.
corrosion and gumming of the fuel injection pump
C.
salt deposits in the exhaust manifold
D.
slag deposits in the fuel injection equipment
【单选题】4-2、pH = 9.0的含有5.0 × 10 − 2 mol / L NaCN和1.0 × 10 − 2 mol / L Hg(NO3) 2 的溶液中,叙述CN − 的物料平衡方程式正确的是[ HCN 的pKa = 9.21 ,生成Hg(CN) 4 2 − 络合物] ( )
A.
B.
C.
D.
D
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