A new look at an asteroid orbiting the
sun shows it could possibly smash into the Earth with tremendous force.
But experts say the potential impact is still 872 years away, time enough
for the speeding space rock to alter its course. Named 1950DA, the asteroid--1 kilometer wide--is the most threatening to the Earth of all of the known large asteroids, but the odds are only adout one in 300 that it would impact the planet, researchers said. "One in 300 is pretty long odds," said Jon D. Giorgini, a scientist in Califonia. "I’m not personally going to worry about it. It is so far in the future that lots of things could change." There are approximately 1,000 asteroids bigger than a kilometer that can pass near the Earth in their orbit of the sun. About 580 have been found and their orbits plotted. Of these, only 1950DA represen A. nothing can alter the course of an asteroid in its orbit of the sun B. only about one in 300 asteroids near the sun would hit the Earth C. scientist have managed to identify all the asteroids orbiting the sun D. there is no immediate threat to the Earth from an asteroid [单选题]以下哪项服务对财富管理签约客户收取费用?( )
A.个人网上银行年服务费。 B.个人电话银行年服务费。 C.工行信使(个人)余额变动提醒。 D.手机银行(短信)信息服务费。 [判断题] 骨折固定的材料不宜直接接触皮肤,应在其间垫以棉布等柔软的材料。[1分]
A.正确 B.错误 [判断题]新设备接入现有通信网,应在新设备启动前3个月向有关通信机构移交相关资料,并于15天前提出投运申请。
A.正确 B.错误 [判断题]停车位标线为蓝色表示收费停车位。
A.正确 B.错误 [多选题]建筑坍塌事故现场,消防车停放位置应具有( )哪些特点。
A.便于观察 B.便于展开 C.便于撤离 D.便于搜救 [单选题]特发性血小板减少性紫癜具有确诊意义的是
A.血小板计数减少 B.可见巨大畸形血小板 C.出血时间延长 D.凝血酶原消耗不良 E.毛细血管脆性试验阳性 [判断题]车站对作业区间办理闭塞时,驻站联络员应立即向现场防护员发出确报;如系通过列车,则应提前一个车站(即邻站向本站发车时)发出确报。( )
A.正确 B.错误 [单项选择]肾病综合征并发感染时最多见的是
A. 上呼吸道感染 B. 腹膜炎 C. 尿路感染 D. 皮肤丹毒 E. 胃肠炎 [多选题]装拆接地线时,以下操作顺序正确的有()。
A.装设接地线时,先接接地端,后接导线或地线端 B.装设接地线时,先接导线或地线端,后接接地端 C.拆除时的顺序相反 D.拆除时的顺序相同 E.略 F.略 [判断题]重定向功能是将用户从当前页面或Servlet定向到另一个JSP页面或Servlet。
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