【单选题】The stone chip is thought to be the most important tool because it _______.
A.
was one of the first tools
B.
developed human capabilities
C.
led to the invention of machines
D.
was crucial to the development of mankind
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【单选题】小武的爸爸经常打骂小武的母亲,小武7岁时父母离婚,他被判给爸爸。妈妈经常来看他,接他出去玩,可爸爸担心小武跟妈妈过于亲近会导致小武妈妈要回抚养权,就打骂小武,逼着小武说妈妈不好。对此认识正确的是( )
【简答题】喉癌分型正确的是 C A会厌癌 声门癌 喉咽癌 B喉室癌 梨状窝癌 声门癌 C 声门上癌 声门癌 声门下癌
【单选题】晶格常数为a的简立方晶格的(010)面间距为
【单选题】What happened one night?
A.
The dog fell iii and barked all night long.
B.
The dog played a trick on the speaker.
C.
The dog awakened the speaker and led him to help its master.
D.
The speaker had a nightmare in which he saved his neighbour's life.
【多选题】当MCS-51复位时,下面说法准确的是( )
【单选题】当MCS-51复位时,下面说法准确的是( )。