题目内容
（请给出正确答案）
A.solids.
B.gases.
C.liquids.
D.a vacuum.
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“Scientist 1’s viewpoint indicates that when the mate-rials that compose most of a comet ar”相关的问题
A、Introduction
B、Presentation
C、Acceptance
D、Anniversary celebration
A.is being shaped by the movement of ice.
B.is covered with millions of meteorite craters.
C.is the same temperature as the surface of the Arctic Ocean on Earth.
D.has remained unchanged for millions of years.
A.Comets are composed mainly of frozen materials.
B.Comets are much larger than 100m in diameter.
C.Comets often pass close enough to Earth to inter-sect Earth’s atmosphere.
D.Comets orbit the Sun.
The scientist's work was based on______.
A．occasional observations
B．systematic observations
C．observations of several nests
D．observations of an undisturbed nest
The scientist's work was based on _______.
A．occasional observations
B．systematic observations
C．observations of several nests
D．observations of undisturbed nests
A．at the mercy of
B．in accordance with
C．under the guidance of
D．by means of
The scientist's discovery will have a______ influence on mankind.
A．prominent
B．promising
C．profound
D．productive
A．The scientist is too timid to exchange seats.
B．The broken seat distresses the scientist's liver.
C．It's the first time the scientist be ashen and distraught.
D．No one sits in the seat facing the scientist.
A scientist arrived at the conclusion that climate and temperature have ______ .
A．nothing to do with man’s mental abilities
B．some effect on the intelligence of most people
C．a great effect on everyone’s intelligence
D．no effect on women’s intelligence
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