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【单选题】
心室肌动作电位持续时间较长的主要原因在于A.
0 期去极化缓慢
B.
1 期复极化缓慢
C.
电位变化较小的平台期
D.
慢钙通道失活
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【简答题】When prehistoric man arrived in new parts of the world , something strong happened to the large animals ; they suddenly became extinct. Smaller species survived , the large , slow-growing animals were...
【单选题】A: At last, Fast Jet's bosses have looked at the issue of flight delays.
A.
are they going to
B.
will they going to
【简答题】A friend of mine is a department manager at a large company. His secretary requested a 10% salary raise. The problem was that 10% was a large raise compared to the 5% other employees had received. Was...
【单选题】How many houses or flats have they looked at?
A.
She is lying to Prof.Smith.
B.
She works very hard.
C.
She passed the exam.
D.
She doesn’t work very hard.
【单选题】They all looked at the man surprisedly. No one knew what ______. [ ]
A.
is happening
B.
has happened
C.
was happening
D.
have happened
【多选题】关于计算机字,下列说法正确的是( )
A.
在计算机中，作为一个整体来处理、保存或传送的二进制字串称为计算机字
B.
计算机字有数据字和指令字两种
C.
一个计算机字就是指两个字节
D.
计算机字都是32比特
E.
计算机字的位数为字长，字长是任意的
【单选题】关于计算机字，下列说法正确的是（ ）。
A.
在计算机中，作为一个整体来处理、保存或传送的二进制字串称为计算机字。
B.
一个计算机字就是指两个字节。
C.
计算机字都是 32 比特。
D.
计算机字的位数为字长，字长是任意的。
【单选题】关于数字计算机，下列说法正确的是（ ）。
A.
数字计算机处理的是非连续变化的数据，这些数据在时间上是离散的
B.
数字计算机计算精度高，主要用于过程控制
C.
数字计算机输入的是模拟量，输出的是数字量
D.
数字计算机输入的是数字量，输出的是模拟量
【单选题】听力原文：W: Have you ever looked really closely at the snowflake? M: Sure. But they usually melt too fast for me to get a close look. Why do you ask? W: I'm just curious. I was reading an article about th...
A.
She has never seen snow before.
B.
She is conducting research on snow.
C.
She wants to make artificial snow.
D.
She has been reading about snow.
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