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【单选题】
She was so ______ in the computer games that she forgot to have class.A.
attracted
B.
concentrated
C.
involved
D.
drawn
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【简答题】用氟离子选择性电极测定F - 时，由于主要干扰来源于OH - ，所以试液的酸度越大，测得的结果越准确。( )
【简答题】组合机床常用的卡头分为弹簧卡头和 两类。A. 浮动卡头
【单选题】Sleeping disorders are
A.
linked to fatal diseases and conditions.
B.
one of the main causes of strokes and heart failure.
C.
common in babies.
D.
unusual but can be life-threatening.
【单选题】To Montresor, the fatal weakness of Fortunato is his _______ for his connoisseurship in wine.
A.
knowledge
B.
arrogance
C.
faith
D.
seeming ignorance
【单选题】One fatal weakness of this strategy is that if one part has a defect, then it will affect __________
A.
millions of Toyota cars in Europe, the US and China
B.
Toyota’s reputation
C.
the export of Japanese cars
D.
many models and many vehicles
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