图9-11是某日某时北半球某平原地区500百帕等压面的高度分布图(单位:米)。读图回答1-3题。1.图中A、B、C三地气压P相比较( )A.PA>PC>PBB.PA<PC<PBC.PC>PB>PAD.PA=PC=PB2.此时A、B两地近地面的天气特征( )A.A近地晴朗,B近地晴朗B.A近地阴雨,B近地阴雨C.A近地阴雨,B近地晴朗D.A近地晴朗,B近地阴雨3.C点近地面吹( )A.西南风B.东南风C.西北风D.东北风
Tom with his friends _______ to Shanghai many times before.( )
have gone
have been
has gone
has been
Don't make noise in the hospital, _______?( )
do you
will you
won't you
don't you
It's important for us _______ to our teachers when we have problems.( )
to talk
talking
talks
talk
-Must I leave the reading room before 6o'clock?
-No, you _______. You can stay here until 6:30.( )
can't
needn't
mustn't
shouldn't
The woman _______ is the most important in my life is my mother.( )
which
what
whom
who