下列对诗句分析有误的一项是（    ）。

写出算式，使每个算式不相同。

8－6＝____－____＝____－____＝____－____＝ ____－____＝____－

____＝____－____

    Climate change has caused a rise in sea levels. This has increased the amount of salt in fresh water____(use) on coastal farms. As____ result, farmers are ____(gradual) unable to use fields close to the sea.

    However, Marc Van Rijsselberg, a farmer in the Netherlands is now using a____(mix) of sea and fresh water ____(grow) healthy and tasty vegetables.

    He teamed up with scientists from the Free University and divided a farm ____eight negated areas. Separate pipes pumped fresh and sea water, and a computer program created water with eight levels of salinity（含盐度）．

    The water levels and the levels of salinity were controlled by computerized measuring devices called "sensors". Mr. Van Rijsselberg said he was able to harvest vegetables from most of the eight testing areas. He said the vegetables were smaller than ____grown in fresh water. But he said they also had more sugar and salt, so they tasted much____(good).

    He found that potatoes grew better than the other vegetables in the combination of sea and fresh water. Mr. Van Rijsselberg said four kinds of these potatoes would be sent to Pakistan____thousands of hectares of land ____(damage) by salinization (盐化作用) last year.

一个滑轮起重装置如图所示,滑轮的半径是10cm,当重物上升10cm时, 滑轮的一条半径OA绕轴心O按逆时针方向旋转的角度约为(假设绳索与滑轮之间没有滑动,取3.14,结果精确到1°)(   )

①国家合作以国家间共同利益为基础

②竞争、合作与冲突是国际关系的基本形式

③将促进中国企业更好地利用国内国外两个市场、两种资源

④中美双方合作有利于推动当今时代两大主题的实现