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（ ）目前国际储备币种结构已实现多元化，美元已不是主要的储备货币
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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。
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( )。
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