在运算速度上,已连续多次取得世界第一的神威太湖之光超级计算机,其峰值性能为12.5亿亿次 / 秒,这个数据以亿次 / 秒为单位用科学记数法可以表示为 ( )
A. 1 . 25 × 10 8 亿次 / 秒B. 1 . 25 × 10 9 亿次 / 秒
C. 1 . 25 × 10 10 亿次 / 秒D. 12 . 5 × 10 8 亿次 / 秒
We will build a subway to Beijing before 2020.
Wow,_________!Will it pass our hometown?( )
What an excited news
How excited the news is
What exciting news
How exciting news
Is there________ I can help you,madam?
Some chicken,please.( )
something else
anybody else
what else
anything else
Great changes have taken place in Tongliao City.
Yes,our city is______________ than before.( )
beautiful
much beautiful
much more beautiful
most beautiful
I called you at eight o'clock last night,but nobody answered.
Oh,I________ a shower at that time.( )
am taking
took
is taking
was taking
The policeman warned us________ the busy street when the traffic lights are red.( )
don't cross
not crossing
not to cross
can't cross