翻译题 The installed price of solar energy has declined significantly in recent years as policy and market forces have driven more and more solar installations.
【F1】Now, the latest data show that the continued decrease in solar prices is unlikely to slow down anytime soon, with total installed prices dropping by 5 percent for rooftop residential systems, and 12 percent for larger utility-scale solar farms. 【F2】With solar already achieving record-low prices, the cost decline observed last year indicates that the coming years will likely see utility-scale solar become cost competitive with conventional forms of electricity generation.
A full analysis of the ongoing decline in solar prices can be found in two separate Lawrence Berkeley National Laboratory Reports.
【F3】Both reports also stress the fact that while the median price of solar has declined, there is still significant variability in the cost of both rooftop and utility-scale solar installations. For example, among residential systems installed last year, the cheapest 20 percent of systems sold for less than $3.30 per Watt while the most expensive 20 percent sold for more than $5.00 per Watt. 【F4】Likewise, the cheapest 20 percent of utility-scale systems sold for less than $1.60 per Watt while the most expensive 20 percent cost over $2.60 per Watt. The point is that cheap solar in one location doesn't necessarily mean cheap solar everywhere. The installed price still varies a lot.
Perhaps the most interesting piece of data to come out in the latest Lawrence Berkeley National Lab reports is the trend in the price of solar power purchase agreements or PPAs. These prices reflect the price paid for long-term contracts for the bulk purchase of solar electricity. The latest data show that the solar PPA price last year fell below $50 per megawatt-hour (or 5 cents per kilowatt-hour) in 4 of the 5 regions analyzed. 【F5】In the power industry, the rule of thumb for the average market price of electricity is about $30 to $40 per megawatt-hour—so solar is all set to match the price of conventional power generation if prices continue to decline.
Going forward, the declining price of solar across all categories demonstrated by the latest Lawrence Berkeley National Laboratory reports coupled with the extension of the federal renewable energy investment tax credit through the next three years should drive a continued expansion of the U.S. solar market and even more favorable economics in the next few years.

问答题 16.【F1】

【正确答案】目前，最新的数据显示，短期内减缓太阳能价格持续下降的可能性不大。因为住宅屋顶太阳能系统安装的总体费用已降低5％，更大型的公用事业规模的太阳能发电厂安装费用则下降了12％。

【答案解析】①本句是一个复合句，主句是主谓宾结构，宾语由that引导的从句充当。②宾语从句是一个简单的主系表结构，主语是the continued decrease，从句使用了be unlikely to do sth．结构，意为“不大可能做某事”。从句包含一个由with引导的独立主格结构，在句中充当原因状语。

问答题 17.【F2】

【正确答案】太阳能价格已达到历史最低值。去年太阳能成本下降趋势明显，这表明了在未来的几年中公用事业规模的太阳能发电厂比传统发电厂更具成本竞争力。

【答案解析】①本句是一个复合句，包含一个宾语从句。句首是由with引导的独立主格结构充当的伴随状语。主句为主谓宾结构，其中observed是过去分词作定语，修饰主语the cost decline。②主句谓语indicates后接that引导的宾语从句，该从句为主语+谓语+宾语+宾补的结构，become cost competitive．．．为宾语补足语，对宾语utility-scale solar的进一步描述和解释。

问答题 18.【F3】

【正确答案】两份报告都强调，虽然太阳能的中间价已经下降，但是住宅屋顶太阳能系统和公用事业规模的太阳能发电厂的安装成本都仍存在显著的变化。

【答案解析】①本句为复合句，包含一个同位语从句。主句是一个简单的主谓宾结构。②the fact后接that引出的同位语从句，进一步阐释fact“事实”的内容。这个同位语从句本身又是一个复合句，包括一个由while引导的让步状语从句，主句是一个there be句型。

问答题 19.【F4】

【正确答案】同样地，在去年安装的公用事业规模的太阳能发电厂中，最便宜的20％太阳能售价低于每瓦1．60美元，最昂贵的20％太阳能售价超过每瓦2．60美元。

【答案解析】①本句是并列句，由while连接两个分句。两个分句都为主系表结构。②分句2中，the most expensive 20 percent后省略了of utility-scale systems，这一分句与分句1的中心词一致，都是“公用事业规模太阳能发电厂”。

问答题 20.【F5】

【正确答案】根据电力工业的经验法则，电力的平均市场价格大概是每兆瓦时30美元至40美元。因此，如果太阳能价格持续降低，它就随时可以与传统的发电电能价格相匹敌。

【答案解析】①本句为并列复合句。主句为so连接的两个分句。分句1为主系表结构，分句2为主谓宾结构。②分句2中包含一个if引导的的条件状语从句说明solar is all set to match the price of conventional power generation发生的条件，该从句为主谓结构。