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题库 / Prep2008E1-SC-207
Unlike the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, a permanently orbiting space station will have to generate its own electricity.
the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries,
the shuttle and earlier spacecraft, with sufficient enough power in fuel cells and batteries for their short flights,
the short flights of the shuttle and earlier spacecraft, which enabled them to carry sufficient enough power in fuel cells and batteries,
the shuttle and earlier spacecraft, which were capable of carrying sufficient power in fuel cells and batteries for their short flights,
the flights of the shuttle and earlier spacecraft, whose shortness allowed them to carry sufficient power in fuel cells and batteries,
题目分析：
略。
选项分析：
A选项：由unlike连接的两个名词要保证在逻辑上可比，本选项其连接的两者为flights和space station，逻辑上不可比。
B选项：with sufficient enough power in fuel cells and batteries for their short flights是独立主格，其没有说明究竟是谁拥有这些power。若没有说明究竟是谁拥有这些能量的话，那么这个部分显然无法修饰the shuttle and earlier spacecraft，即，在本句逻辑上，必须是the shuttle and earlier spacecraft拥有能量（可以从主句的内容中看出）。
C选项：本选项比较对象错误同(A)。
D选项：Correct. 本选项在语法和逻辑上均是正确的。which引导了一个定语从句，先行词the shuttle and earlier spacecraft在该定语从句中充当主语。
E选项：本选项比较对象错误同(A)。
with位置导致修饰歧义，可能修饰前面的the shuttle and earlier spacecraft也可能修饰后面的主句，改为定语从句可避免此问题
B错的原因应该是sufficient和enough是重复语意。
剩下BD：B的with sufficient enough power in fuel cells and batteries for their short flights是独立主格，无法说清是修饰谁的，有可能是the shuttle and earlier spacecraft 或者 a permanently orbiting space station；
D当时没选是觉得which只就近修饰了earlier spacecraft ·····翻船了
B 【，with】是状语，修饰主句的动词generate，但很明显这个with的意思要和spacecraft绑定。同时 sufficient enough重复
C 比较对象错；sufficient和enough
D 正确 没选是觉得无生命物体用capable 也不对
E 比较对象错。
with位置导致修饰歧义，可能修饰前面的the shuttle and earlier spacecraft也可能修饰后面的主句，改为定语从句可避免此问题
can，既可以描述主观可能性，也可以描述客观可能性。比如，可以说bird can fly, but you can't.；be able to，多用于人和有生物的能力，不用于描述客观事物的能力。 比如说，天能下雨也能下雪，it can rain and snow，但不能说，it is able to rain and snow。；be capable of可以同时描写人和物的能力，但多用与描写事物的能力。比如，the train is capable of carring 100 people.
can我可以做某事；如 I can drive a car.；be able to,是我有能力做某事，如：I am able to repaire a car,事情会比前者复杂一点；be capable of范围大些是多种能力的集合，如： I am capable of building up a plant for cars.有能力建立一个汽车工厂。
本题，飞行器be capable of doing sth，ok
with sth表示具有，伴随。如：Mary married a man with a lot of money. Marry嫁给一个有很多钱的男人；a girl with red hair， 一位红发女郎
这里指带有足够燃料的飞行器。
没看到那个sufficient和enough。。只觉得be capable of doing有点奇怪
B选项，with独立主格作状语（修饰主句） 与 with介词短语作定语（修饰shuttle and spacecraft)，模棱两可
D选项，定语从句直截了当修饰前面名词，能有效避免歧义
B：逗号+介词短语一定是状语，修饰generate，字面意思不合理
C：比较对象有误
D：合理
E：比较对象有误