烧结矿分为两个品级，二级品的含硫量应小于0.1%。（）
参考答案：错
2008北京奥运会主会场“鸟巢”的座席数是91 000个，这个数用科学记数法表示为[ ]
A．0.91×105
B．9.1×104
C．91×103
D．9.1×103
The rain is plentiful in the southeast of the country , yearly .
A．as much as seventy inches
B．as seventy inches much as
C．seventy inches as much as
D．as much seventy inches as
