反应FeS(s)+2[img=27x21]1803a98050eab3c.png[/img]==[img=37x22]1803a98058c65d8.png[/img]+H2S的标准平衡常数[img=27x21]1803a980608edb5.png[/img]为（ ）。 A: [img=38x27]1803a98068ee7f6.png[/img](FeS)+[img=39x24]1803a9807087238.png[/img]([img=33x22]1803a98078977ac.png[/img])·[img=39x24]1803a980812d0eb.png[/img]([img=33x22]1803a98078977ac.png[/img]) B: [img=38x27]1803a98068ee7f6.png[/img](FeS)-[img=39x24]1803a9807087238.png[/img]([img=33x22]1803a98078977ac.png[/img])·[img=39x24]1803a980812d0eb.png[/img]([img=33x22]1803a98078977ac.png[/img]) C: [img=38x27]1803a98068ee7f6.png[/img](FeS)·[img=39x24]1803a9807087238.png[/img]([img=33x22]1803a98078977ac.png[/img])·[img=39x24]1803a980812d0eb.png[/img]([img=33x22]1803a98078977ac.png[/img]) D: [img=38x27]1803a98068ee7f6.png[/img](FeS)/[[img=39x24]1803a9807087238.png[/img]([img=33x22]1803a98078977ac.png[/img])·[img=39x24]1803a980812d0eb.png[/img]([img=33x22]1803a98078977ac.png[/img])]

In 1803 the United States purchased Louisiana from _____.

In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.

f(x)在[0,1]上有连续的二阶导数，f(0)=f(1)=0,任意x属于[0,...715af2ac3f81f8.png"]

国际网球联合会成立于 A: 1903 B: 1803 C: 1913 D: 1923

霍尔效应哪一年发现的？ A: 1881 B: 1879 C: 1803 D: 1831

以下哪些图像格式支持透明背景（） A: PNG/JPEG B: PNG/GIF C: JPEG/GIF D: BMP/PNG

卢浮宫是_______年向公众开放的？（ ） A: 1789 B: 1803 C: 1792 D: 1793

In 1803, President Thomas Jefferson made the biggest real estate deal and bought the vast Louisiana from Napoleon.

空想社会主义的开山之作《乌托邦》出版于() A: 1623 B: 1803 C: 1821 D: 1516