单项选择题

The problem Howe was trying to solve was______.
A．what kind of thread to use
B．how to design a needle which would not break
C．where to put the needle
D．how to get the thread to run smoothly around the needle

A.
A．what
B.how
C.where
D.how
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单项选择题
Dreams are sometimes called 'secret messages to ourselves' because______.A．strange images are used to communicate ideasB．images which have no meaning are usedC．we can never understand the real meaningD．only specially trained people can understand them
A.
A．strange
B.images
C.we
D.only
单项选择题
有以下程序 include main( ){ intb[3][3]={0，1，2，0，1，2，0，1，2)，i,j，t=1； for(i=0；i＜=i；j++) t+=b[i][bD][i]]； printf(％d n，t)；) 程序运行后的输出结果是（）

A．3
B．1
C．9
D．4
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