QUES: The Antarctic fur seal was very heavily hunted in the 18th and 19th centuries for its pelt by sealers from the United States and the United Kingdom. The Weddell seal, a "true seal", is named after Sir James Weddell, commander of British sealing expeditions in the Weddell Sea. Antarctic krill, which congregate in large schools, is the keystone species of the ecosystem of the Southern Ocean, and is an important food organism for whales, seals, leopard seals, fur seals, squid, icefish, penguins, albatrosses and many other birds.
What is the keystone species of the Arctic Ocean?

ANS: unanswerable

QUES: On runways, green lights indicate the beginning of the runway for landing, while red lights indicate the end of the runway. Runway edge lighting consists of white lights spaced out on both sides of the runway, indicating the edge. Some airports have more complicated lighting on the runways including lights that run down the centerline of the runway and lights that help indicate the approach (an approach lighting system, or ALS). Low-traffic airports may use pilot controlled lighting to save electricity and staffing costs.
On runways, what indicate the beginning of the runway for landing?

ANS: green lights

QUES: At the same time, some Alsatians were in opposition to the Jacobins and sympathetic to the invading forces of Austria and Prussia who sought to crush the nascent revolutionary republic. Many of the residents of the Sundgau made "pilgrimages" to places like Mariastein Abbey, near Basel, in Switzerland, for baptisms and weddings. When the French Revolutionary Army of the Rhine was victorious, tens of thousands fled east before it. When they were later permitted to return (in some cases not until 1799), it was often to find that their lands and homes had been confiscated. These conditions led to emigration by hundreds of families to newly vacant lands in the Russian Empire in 18034 and again in 1808. A poignant retelling of this event based on what Goethe had personally witnessed can be found in his long poem Hermann and Dorothea.
What had happened to most of the people who fled Sungau during the war when they were allowed to return home?

ANS: lands and homes had been confiscated

QUES: The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003.
When was the second satellite for the BeiDou-1 system launched?

ANS:
December 21, 2000