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Sunspots, vortices of gas associated with strong electromagnetic activity, are v
Sunspots, vortices of gas associated with strong electromagnetic activity, are v
游客
2024-01-13
59
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问题
Sunspots, vortices of gas associated with strong electromagnetic activity,
are visible as dark spots on the surface of the Sun but have never been sighted on
the Sun’s poles or equator.
选项
A、are visible as dark spots on the surface of the Sun but have never been sighted on
B、are visible as dark spots that never have been sighted on the surface of the Sun
C、appear on the surface of the Sun as dark spots although never sighted at
D、appear as dark spots on the surface of the Sun, although never having been sighted at
E、appear as dark spots on the Sun’s surface, which have never been sighted on
答案
C
解析
本题考到介词on与at的区别。on表示在某一个面(平面或面)上;而at表示在某一点或线上。pole是一个点,equator是一条线,A、B、E中在poles和equator之前用介词on是不妥的。C和D比较,D有两个缺陷:(1)on短语本应是地点状语修饰appear,却被改为定语修饰dark spots;(2)在公理中说过:having been done=done,前者不简洁。不过,本题若不知道at与on的这一细微差异,也可用其他方式来判别。首先A、B中的visible与其后的have neverbeen sighted是前后矛盾的。E中:which很可能被认为是指代dark spots而不是sunspots。同时,用which从句取代了原句的让步状语从句,改变了句意。另外,A、B、D、E中on the sun’ssurface/on the surface of the sun的位置均是错误的。
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