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题库 / Prep2007E1-SC-1
To meet the rapidly rising market demand for fish and seafood, suppliers are growing fish twice as fast as their natural growth rate, cutting their feed allotment by nearly half and raising them on special diets.
their natural growth rate, cutting their feed allotment
their natural growth rate, their feed allotment cut
growing them naturally, cutting their feed allotment
they grow naturally, cutting their feed allotment
they grow naturally, with their feed allotment cut
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人类无法干预鱼类自然生长
供应商养殖鱼类的生长速度和鱼类自然生产速度作比较.不是与供应商自然养殖鱼类速度比较
suppliers cannot grow fish
as fast as结构中第一个as是副词，修饰紧跟着的形容词或者副词。第二个as是连词后面跟一个句子。
choice a,b: the rate cannot be 'fast/slow',but can be 'high/ low'
c.不是suppliers种植鱼naturally而是fish grow naturally
陷阱：growth rate 中有growth，容易接受fast作为修饰
根据raising them可知them指fish，所以前面的they都是指fish
要与and raising平行，只能cutting，排除BE。
A：rate只有high/low, 不能用fast修饰，可以说fish are growing fast或者the rate is high。
C：growing them naturally的主语是suppliers，供应者养殖鱼肯定是人工的，谈何自然的人工养殖,,应该是鱼自然生长。
A，把被比较部分补足是as fast as the rate is，那么是在把suppliers are和 the rate is进行比较，错误。
A难道不应该是错在比较概念不对等且也不属于主语对等省略动词的情况吗？
rate只能是high/low，不能是fast，suppliers are growing fish twice as fast as their natural growth rate错误，改成suppliers are growing fish twice as fast as they grow naturally
suppliers cannot grow fish
as fast as结构中第一个as是副词，修饰紧跟着的形容词或者副词。第二个as是连词后面跟一个句子。
choice a,b: the rate cannot be 'fast/slow',but can be 'high/ low'
https://gmatclub.com/forum/to-meet-the-rapidly-rising-market-demand-for-fish-and-seafood-supplie-175958.html#p1391061
rate-high.
C指代不明 不是suppliers种植鱼naturally而是fish grow naturally
C，suppliers are growing fish twice as fast as (suppliers are) growing fish naturally
D，suppliers are growing fish twice as fast as fish grow naturally
D中第一个growing是现在进行时，表人们正在饲养鱼，第二个grow是一般现在时，指鱼通常具有的自然生长的状态。
比较的时间可以不一致，今天的我比昨天的我好，今天我打球打得比昨天好。
fast不能用来修饰rate。AS。。。AS前后一定要平行，suppliers are growing fish 与they grow naturally对应。
供应商养殖鱼类的生长速度和鱼类自然生产速度作比较.不是与供应商自然养殖鱼类速度比较
rate不可以是fast，只能是high
前后比较的是一个动作
grow them naturally逻辑上说不通
这个题单纯从平行结构，特别具有欺骗性，还得仔细读题目意思。出题人太心机了。
rate不能和fast 搭配，growing them naturally" is illogical.
C中："growing them naturally" is illogical.
in this construction, "them" (= fish) is the OBJECT of "growing". this implies that someone else must be growing the fish -- which doesn't make sense if we're talking about natural growth.
意思错 C 与自然增长必须是主动，不能是growing them naturally，将原句的意思更改为“供应商养殖鱼类的生长速度和供应商自然养殖鱼类的速度做比较”,不可能是供应商自然增长地养鱼。应该是“鱼自然生长”。
"growing them naturally" is illogical.
in this construction, "them" (= fish) is the OBJECT of "growing". this implies that someone else must be growing the fish -- which doesn't make sense if we're talking about natural growth.
notice that the correct answer contains "they grow naturally", a more accurate description of what actually happens -- the fish just grow, by themselves.
D的they指代的是fish，因为有grow所以没有歧义。虽然比较拗口，但相比C的语义错误来说是better的