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（ ）一般来说，国际储备大小与一国经济活动的规模大小成反比。
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In the boxes below are some of the expressions you have learned in the Text A. Complete the following sentences with them. Change the form where necessary.Being a mother of two young kids, Sarah always __________ spending as much time as she can with them.
Realizing that his retirement was near __________, he looked for some additional income.
结晶是固体物质以晶体状态从蒸汽、溶液或熔融物中析出的过程。不同的溶解度特征对于结晶工艺的选择起决定性作用。当溶解度随温度变化较大时,下列哪项是更合适的结晶形式( )。
三对角线矩阵法是多组分多级分离过程严格计算的最常用方法。对于窄沸程进料的精馏过程的严格计算常采用泡点法(BP法)即在求得各级组成后,各级温度的计算采用( )来校核。
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