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【单选题】
苦杏仁有毒,是因为其代谢过程中可形成( )
A.
氧化物
B.
自由基
C.
氰化物
D.
不能代谢,原生毒
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【单选题】中医学学术理论总结与探索时期是( )
A.
明清时期
B.
奴隶社会时期
C.
战国至秦汉时期
D.
晋唐时期
E.
宋元时期
【单选题】听力原文: Strikes are very common in Britain. They are extremely harmful to its industries. In fact, there are other countries in Western Europe that lose more working days through strikes every year than...
A.
They often take place in the major industries.
B.
British trade unions are more powerful.
C.
There are more trade union members in Britain.
D.
Britain has less working days through strikes every year.
【单选题】听力原文: Strikes are very common in Britain. They are extremely harmful to its industries. In fact there are other countries in Western Europe that lose more working days through strikes every year than ...
A.
They often take place in the major industries.
B.
British trade unions are more powerful.
C.
There are more trade union members in Britain.
D.
Britain loses more working days through strikes every year.
【单选题】The United Kingdom is also known by its official name
A.
the United Kingdom of Great Britain and England.
B.
the United Kingdom of Great Britain.
C.
the United Kingdom of British Isles.
D.
the United Kingdom of Great Britain and Northern Ireland.
【简答题】为研究生长素( IAA )和赤霉素( GA 3 )对玉米胚芽鞘生长的影响,得到如下实验结果。请回答下列问题: ( 1 )实验中除激素的因素外,可能影响实验结果的因素为 ________ (填 “ 自变量 ” 、 “ 因变量 ” 或 “ 无关变量 ” )。图中 “ ? ” 处理方式是 ______________________________ 。 ( 2 )实验中用激素处理胚芽鞘时,应将 IAA ...
【判断题】当砂浆原材料种类及比例一定时,其流动性主要取决于单位用水量。
A.
正确
B.
错误
【简答题】如图所示,与图中情景相关的说法中正确的是 A.动物之间可以通过声音传递信息 B.控制公路噪声的唯一途径是减少鸣笛 C.海豚只能接收超声波 D.交响乐队中所有乐器音色完全相同
【判断题】含羞草这种收起叶柄,并且把头低下的现象并不是因为害羞,而是它受到刺激和震动后的一种反应。这种反应在生物学上称为感性运动。
A.
正确
B.
错误
【单选题】新建、扩建、改建建设项目和技术改造、技术引进项目可能产生职业病危害的,建设单位在( )应当向有关行政部门提交职业病危害预评价报告。
A.
可行性论证阶段
B.
设计阶段
C.
建设过程中
D.
竣工验收阶段
【判断题】动物之间可以通过声音传递信息。
A.
正确
B.
错误
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