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【简答题】
看图，选择对应的句子。 ( ) 1. A. This is the flag of the U. S. ( ) 2. B. This is the U. K.'s flag. ( ) 3. C. This is China's flag. ( ) 4. D. This is the map of the U. K.
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皮皮学刷刷变学霸
举一反三
【单选题】, the compass was first made in China.
A.
It is known to all
B.
As is known to all
C.
It is known that
D.
We all know
【单选题】What was the purpose when the magnetic compass was first invented?
A.
Divination.
B.
Navigation.
C.
Enjoyment.
D.
War.
【单选题】Nearly two thousand years have passed______ the Chinese first invented the compass.
A.
when
B.
before
C.
since
D.
after
【单选题】创建网页中的拖动层行为效果,要选择事件为鼠标移动到对象上面是( )。
A.
OnClick
B.
OnMouseup
C.
OnMousetop
D.
OnMouseOver
【单选题】下列哪一项不是减数分裂的特征（）
A.
是生殖细胞的一种特殊分裂方式
B.
DNA复制只发生在前减数分裂间期
C.
DNA复制一次，细胞分裂二次
D.
减数分裂期可合成少量DNA
E.
减数分裂为一种特殊的有丝分裂
【单选题】According to ancient records, natural magnets were employed in China as direction-finding devices. This led to the first compass, called ____during the Warring States Period.
A.
Si Nan
B.
navy compass
C.
wet compass
D.
dry compass
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