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【单选题】
Foxes and farmers have never got on well. These small dog-like animals have long been accused of killing farm animals. They are officially classified as harmful and farmers try to keep their numbers down by shooting or poisoning them. Farmers can also call on the services of their local hunt to control the fox population. Hunting consists of pursuing a fox across the countryside, with a group of specially trained dogs, followed by men and women riding horses. When the dogs eventually catch the fox they kill it or a hunter shoots it. People who take part in hunting think of it as a sport they wear a special uniform. of red coats and white trousers, and follow strict codes of behavior. But owning a horse and hunting regularly is expensive, so most hunters are wealthy. It is estimated that up to 100,000 people watch or take part in fox hunting. But over the last couple of decades the number of people opposed to fox hunting, because they think it is brutal, has risen sharply. Nowadays it is rare for a hunt to pass off without some kind of confrontation between hunters and hunt saboteurs. Sometimes these incidents lead to violence, but mostly saboteurs interfere with the hunt by misleading riders and disturbing the trail of the fox’s smell, which the dogs follow. Noisy confrontations between hunters and saboteurs have become so common that they are almost as much a part of hunting as the pursuit of foxes itself. But this year supporters of fox hunting face a much bigger threat to their sport. A Labour Party Member of the Parliament, Mike Poster, is trying to get the Parliament to approve a new law which will make the hunting of wild animals with dogs illegal. If the law is passed, wild animals like foxes will be protected under the ban in Britain. Rich people in Britain have been hunting foxes ______.
A.
for recreation
B.
in the interests of the farmers
C.
to limit the fox population
D.
to show off their wealth
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【单选题】DNA的复制需要引物,其主要原因是 [     ]
A.
可加快DNA的复制速度
B.
引物可与DNA母链通过碱基互补配对结合
C.
引物的5′端有助于DNA聚合酶延伸DNA链
D.
DNA聚合酶只能从3′端延伸DNA链
【多选题】DNA生物合成包括
A.
聚合酶链反应
B.
DNA的复制
C.
反转录合成
D.
DNA的修复
【单选题】适合制成胶囊剂的药物是
A.
具有吸湿性的药物
B.
具有苦味的药物
C.
具有风化性的药物
D.
具有刺激性的药物
【单选题】下列关于DNA的复制说法不正确的是
A.
子代链合成方向从5到3
B.
DNA的复制是半保留复制
C.
把冈琦片段连接起来的是DNA聚合酶
D.
DNA的复制需要RNA聚合酶
【多选题】下面关于长短期记忆神经网络LSTM的描述中,正确的说法是哪些?
A.
LSTM中通过引入输入门、遗忘门、输出门解决了RNN中存在的梯度消失和梯度爆炸
B.
LSTM中门的开关程度是由信息的权重决定的,即训练过程中记住重要信息
C.
与RNN相比,LSTM中引入更多参数,所以其训练周期更久
D.
LSTM 中使用 Sigmoid 实现门限控制,而用 TanH 实现数据处理
【单选题】DNA复制的半不连续性是指
A.
DNAA两条链的复制都是多复制子复制
B.
DNA的复制一条链是单复制子复制,另一条链是多复制子复制
C.
DNA复制时,领头链连续复制,随从链不连续复制
D.
DNA复制时,随从链连续复制,领头链不连续复制
E.
DNA复制时,随从链不连续复制,领头链不连续复制
【单选题】在同一被测量的多次测量过程中,保持常数或以可以预知方式变化的那一部分误差称为( )。
A.
系统误差
B.
仪器误差
C.
随机误差
D.
粗大误差
【简答题】简要回答应当如何正确地看待班级中的竞争与合作。
【单选题】目前国际公认性能最佳的宫内节育器是
A.
TCu-IUD
B.
TCu-380A
C.
TCu-200
D.
VCu-IUD
E.
TCu-200B
【单选题】下列关于DNA复制的叙述,哪一项是错误的
A.
DNA的复制为半保留复制
B.
需RNA指导的DNA聚合酶参加
C.
为半不连续复制
D.
以四种dNTP为原料
E.
需DNA指导的DNA聚合酶参加
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