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【简答题】
什么是解链温度？影响DNA的Tm值大小的因素有哪些？
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举一反三
【单选题】听力原文：W: Let's do some warm-up exercises before beginning our swimming. We should always start by exercising by the side of the pool to warm up our muscles. M: Yes, you are right. Let's begin. One, two...
A.
Keeping fit
B.
Health issues
C.
Swimming
D.
Shopping
【单选题】M: We have time, don't we? Every time we've gone on a trip, we've always been tied down by schedules. This time will be different. We don't have to rush. W: You're right. This is our first trip since ...
A.
It is the first time they have been on a trip.
B.
They cannot do what they like before.
C.
They don ’ t have to care about the time.
D.
They have to travel by schedules now.
【单选题】有关阑尾的描述，正确的是（）
A.
动脉来自肠系膜下动脉
B.
阑尾根部是3条结肠带集中处
C.
阑尾位于结肠起始部
D.
经阑尾孔开口于盲肠下端
E.
位于右髂窝，是腹膜间位器官
【单选题】听力原文：W: Have you ever put this type of rack together before? M: No, not yet. But I am quite sure if we carry out these instructions exactly, we are not going to have any difficulty. Q: What are the tw...
A.
Practice working together.
B.
Carry the parts Outside.
C.
Find the troubles.
D.
Act on the directions.
【单选题】有关阑尾的描述，正确的是( )
A.
动脉来自肠系膜下动脉
B.
阑尾根部是三条结肠带集中处
C.
阑尾附于结肠起始部
D.
经阑尾孔开口于盲肠下端
E.
位于右髂窝，是腹膜间位器官
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