下列属于我国东风汽车标志图案的是（ ） A． B． C． D．

As everyone knows, the South China Sea is _____ part of China, _____ important part of China,

any other country outside Asia doesn't have _____ say in this issue. 

[    ]

A. a, an, /

B. /, an, a

C. a, the, the

D. a, an, /

(2010·江苏高考)George is going to talk about the geography of his country, but I'd rather he ________ more on its culture.

A．focus

B．focused

C．would focus

D．had focused

企业某种存货的期初余额是160万元，没有发生跌价的情况，本期购入存货80万元，领用存货120万元，期末该存货的可变现净值为113万元，则期末应提取的存货跌价准备是（）万元。

A．4

B．2

C．5

D．7

炉水中二氧化硅的危害是（）。

A、易结垢

B、易降低pH值，对金属有腐蚀

C、易产生微生物

D、无危害

运用细粒碎屑沉积物法能更精确地获取大陆上部地壳的全部元素化学组成