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【单选题】
狮子座流星雨与哪颗彗星有关（）。
A.
谭普－塔特尔彗星（CometTemple-TuttlE.
B.
斯威夫特－塔特尔彗星（CometSwift-TuttlE.
C.
池－谷关彗星（CometIkeya-Saki）
D.
比拉彗星（3D/BielA.
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Unless we spend money to spot and pr asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say some scientists. Asteroids are bigger versions of the meteoroids (流星) that...
A.
It is very unlikely, but the er exists.,
B.
Such a collision might occur once every 25 years.
C.
Collisions of smaller asteroids with Earth occur more often than expected.
D.
It’s still too early to say whether such a collision might occur.
【单选题】狮子座流星雨与哪颗彗星有关（）。
A.
谭普－塔特尔彗星（CometTemple-TuttlE.
B.
斯威夫特－塔特尔彗星（CometSwift-TuttlE.
C.
池－谷关彗星（CometIkeya-Saki）
D.
比拉彗星（3D/BielA.
【单选题】Space is a erous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts (67) our protective blanket on (68) . Light gets through, ...
A.
from
B.
than
C.
as
D.
away
【单选题】Space is a erous place, not only because of meteors (流星) but also because of rays from the sun and other stars．The atmosphere again acts 【C1】______ our protective blanket on 【C2】______ ．Light gets...
A.
for
B.
with
C.
on
D.
as
【单选题】Space is a erous place, not only because of meteors(流星) but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and...
A.
The Atmosphere and Our Environment
B.
Research on Radiation
C.
Effects of Space Radiation
D.
Importance of Protection Against Radiation
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A.
正确
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椭圆
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抛物线
C.
双曲线
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正圆
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正确
B.
错误
【单选题】Unless we spend money to spot and pr asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say some scientists. Asteroids are bigger versions of the meteoroids (流星) that...
A.
It is very unlikely, but the er exists.,
B.
Such a collision might occur once every 25 years.
C.
Collisions of smaller asteroids with Earth occur more often than expected.
D.
It’s still too early to say whether such a collision might occur.
【单选题】狮子座流星雨与哪颗彗星有关（）。
A.
谭普－塔特尔彗星（CometTemple-TuttlE.
B.
斯威夫特－塔特尔彗星（CometSwift-TuttlE.
C.
池－谷关彗星（CometIkeya-Saki）
D.
比拉彗星（3D/BielA.
【单选题】亚里士多德认为流星的来源是（）。
A.
太阳
B.
月球
C.
地面
D.
宇宙
【单选题】哈雷彗星几年一个周期
A.
75.0
B.
76.0
C.
77.0
D.
78.0
【单选题】产生'彗星'征的伪像，也叫做
A.
混响伪像
B.
多次内部混响伪像
C.
部分容积效应
D.
声速失真伪像
E.
镜像伪像
【单选题】Space is a erous place, not only because of meteors(流星) but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and...
A.
The Atmosphere and Our Environment
B.
Research on Radiation
C.
Effects of Space Radiation
D.
Importance of Protection Against Radiation