化学上把pH一7的物质称为中性物质,而在商业上则把______的清洁剂皆称为中性清洁剂。
(A)6≤pH<7 (B)6≤pH≤7
(C)6≤pH<8 (D)6≤pH≤8
第1题
He devotes his time to the acquisition of knowledge.
A.achievement
B.handle
C.obtaining
D.provision
第3题
A、His happy life as a boy
B、New York and the poor of the city
C、The newspaper
D、His life in prison
第4题
A. Right
B. Wrong
C. Not mentioned
第5题
A.Right
B.Wrong
C.Not mentioned
第7题
A.Right
B.Wrong
C.Not mentioned
第8题
Poor old Bill had a lot of money ______ while he was on holiday.
A.steal
B.stealing
C.stole
D.stolen
第9题
A.happy
B.tragic
C.sad
D.pessimistic
第10题
______other courses, he devotes all his time to studying English.
A.Not liking
B.Liking not
C.Having not liked
D.Not having liked
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