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【单选题】
The girl was quite angry ______ his boy friend for his being late.A.
for
B.
on
C.
with
D.
at
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【简答题】已知25℃时下列弱酸的解离常数： HOCl的Kaθ=3．5×10-8，H3BO3的Kaθ=5．8×10-10，CH3COOH的Kaθ=1．8×10-5 (1)配置PH=4的缓冲溶液，用哪种酸最好? (2)需要多少克这种酸和多少克氢氧化钠配制1．0 L的缓冲溶液，其中这种酸和它的共轭碱的总浓度等于1．0 mol.dm-3。
【简答题】3) 评定车用汽油的 辛烷值 可采用两种试验工况,分别称为 辛烷值 与 辛烷值 。
【简答题】2 Complete the words. (You will answer the
questions in Exercise 3.) ► Do you live near a w o o d? wood ( Yes, I do. It’s 200 metres from my home. ) 1 Do you live in a v _ ll _ y or on a h _...
【单选题】— you sing the song Where Are You Going, Daddy? — Yes. It’s easy.
A.
Can
B.
May
C.
Must
【简答题】Can you tell me where you ____ from? Yes, I'm from China.
【单选题】听力原文：M: Are you really going to buy that painting? Where will you hang it? W: Yes, I think it would brighten my living room wall. Don't you love the way the blues and greens blend? Q: Where does the w...
A.
In the hall.
B.
At an exhibit.
C.
The kitchen.
D.
Living-room wall.
【单选题】A: Could you tell me where you were studying at that time? B: ( ).
A.
Oh, really?
B.
Yes, I could.
C.
enjoyed the very much.
D.
was studying at the University of Sydney
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