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举一反三
【单选题】Compared with their cosmologist(宇宙学家) colleagues, cosmogonists(星源学家) can sound a little old-fashioned. Edgar Allen Poe turned to the mysteries of cosmogony in an 1848 public lecture, just reprinted by...
A.
the Sun’s equator lies in the planetary plane
B.
the Sun leans over because of loss of mass
C.
the Sun and the planets have different origins
D.
the Sun took shape somewhere in the Galaxy
【单选题】Compared with their cosmologist(宇宙学家) colleagues, cosmogonists(星源学家) can sound a little old-fashioned. Edgar Allen Poe turned to the mysteries of cosmogony in an 1848 public lecture, just reprinted by...
A.
The Solar System is completely flat.
B.
Mercury and Pluto are not in the same plane with other planets.
C.
The planets formed from a nebular disc orbiting the Sun.
D.
The Sun formed out of the same nebular disc with its planets.
【单选题】气簿中云状栏记录为“Sctra－”，是表示（）。
A.
有干质视程障碍现象，天空部分可辨别，可见Sctra云状
B.
下层布满Sctra，从云隙中可见上层有云，云状无法判定
【单选题】Passage Four Compared with their cosmologist(宇宙学家) colleagues, cosmogonists(星源学家) can sound a little old-fashioned. Edgar Allen Poe turned to the mysteries of cosmogony in an 1848 public...
A.
the Sun’s equator lies in the planetary plane
B.
the Sun leans over because of loss of mass
C.
the Sun and the planets have different origins
D.
the Sun took shape somewhere in the Galaxy
【多选题】2011年1月28日日本雾岛发生火山喷发，将滚热的云状火山气体和火山灰喷向高空．火山气体主要包括 ①水蒸气 ②CO 2 ③SO 2 ④SO 3 ⑤HCl ⑥Cl 2 这些气体对环境造成了极大的危害． 对①～⑥中的相关气体的叙述中正确的是（ ）
A.
②③④⑥属于非电解质
B.
②③④属于酸性氧化物
C.
⑤的水溶液属于无氧酸中的一元强酸
D.
收集一定量的火山气体通入足量BaCl 2 溶液中，生成BaCO 3 、BaSO 3 、BaSO 4 三种沉淀