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【单选题】
下列关于基因突变的说法，正确的是（）A.
如果显性基因A发生突变，只能产生等位基因a
B.
通过人工诱变的方法，人们能培育出生产人胰岛素的大肠杆菌
C.
基因突变都可以通过有性生殖传递给后代
D.
基因突变是生物变异的根本来源，有的变异对生物是有利的
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皮皮学刷刷变学霸
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【简答题】三菱FX系列PLC的编程元件中,特殊辅助继电器M8012是时间为( )的时钟脉冲,M8013是时间为( )的时钟脉冲。
【简答题】How many years had the creator Walt Disney had for the dream of Disneyland? He had the dream for ______
【多选题】2019年是扫黑除恶专项斗争第二年,要保持清醒头脑,准确把握专项斗争的“时”、“势”、“责”,何为“时”、“势”、“责”?
A.
从专项斗争的“时”看，2019年是党和国家历史上具有特殊重要意义的一年，将迎来新中国成立70周年；
B.
从专项斗争的“势”看，随着专项斗争不断深入，涉黑涉恶问题呈现出新特点；
C.
从专项斗争的“责”看，各地各有关部门认真履职尽责，勇于担当作为，实际效果是好的。
【简答题】For many years Henry had been a journalist. He had worked on many international newspapers and magazines and traveled over the world. Henry had witnessed war and natural disasters such as floods, eart...
【简答题】阅读理解。 For many years Henry had been a journalist. He had worked on many international newspapers and magazines and traveled all over the world. Henry had witnessed wars and natural disasters such as f...
【单选题】Many network members had expressed an interest in the merger, as it will not only strengthen the network but also help to______ efforts.
A.
summon
B.
stimulate
C.
soar
D.
streamline
【多选题】《荔镜记》是建安版画小图样式的代表作品，版画图幅虽小，但人物刻画的十分生动传神，保留了建安版画的艺术特色
A.
落笔着眼于大处
B.
简洁概括
C.
用刀果断直接
D.
版味浓厚
【多选题】《荔镜记》版画图幅虽小,但人物刻画的十分生动传神,保留了建安版画的艺术特色—— 是建安版画小图样式的代表作品(多选题)
A.
落笔着眼于大处
B.
简洁概括
C.
用刀果断直接
D.
版味浓厚
【单选题】_______,but he still could not understand it.
A.
He had been told many times
B.
Having been told many times
C.
Told many times
D.
Although he had been told many times
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