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【单选题】

观测流星（）

A.
一定需要望远镜
B.
一定需要照相机
C.
一定需要各种观测仪器
D.
可以只用肉眼
题目标签：流星观测测流
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【判断题】和或差的中误差的平方等于两观测中误差的平方和。
A.
正确
B.
错误
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【简答题】阅读理解。 Millions of years ago there were many types of dinosaurs on earth. Most dinosaurs were plant-eaters. The Apatosaurus, for example, had a long thin neck so that it could eat leaves from trees....
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【单选题】取米泔水样粪便作悬滴观察，细菌运动活泼，呈穿梭样或流星状运动的细菌是
A.
结核杆菌
B.
痢疾杆菌
C.
金黄色葡萄球菌
D.
变形杆菌
E.
霍乱弧菌
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【判断题】流星是小行星进入地球的大气层后被大气烧蚀发光的阶段。()
A.
正确
B.
错误
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【单选题】Space is a dangerous 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
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【判断题】观测样本越多，所得结果的标准差越小。
A.
正确
B.
错误
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【单选题】Space is a dangerous 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
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【单选题】Space is a dangerous 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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【简答题】Directions: In this section there is a passage in English. Translate the five sentences under-lined into Chinese and write your translation on ANSWER SHEET 2.56. When you are in the business of sendin...
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【单选题】Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts (62) our protective blanket on (63) . Light gets throug...
A.
[A] with [C] under
B.
[B] from [D] for
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