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【单选题】
病症出现，叶暗绿色，生长延缓，叶柄上紫色，这是植物缺少（）元素。A.
氮
B.
磷
C.
钾
D.
镁
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反馈参考答案：
举一反三
【简答题】求解逗号表达式 x=a=3,6*a 后,表达式值、x、a 的值依次为 。逗号运算符应先求解逗号前面的,求出后变量经重新赋值,在计算逗号后面的。
【单选题】The country's gross domestic product was more than economists______for the first quarter.
A.
wanted
B.
thought
C.
expected
D.
announced
【简答题】求解逗号表达式 x=a=3,6*a 后,表达式值、x、a 的值依次为
【单选题】The difference between a country's Gross National Product (GNP) and its Gross Domestic product (GDP) is that
A.
GNP refers to production within the nation while GDP refers to production by domestic factors no matter where they are located.
B.
GNP is always bigger than GDP.
C.
GDP refers to production within the nation while GNP refers to production by domestic factors no matter where they are located.
D.
Two of the above are true.
【单选题】The birth rate in a city ________ to fall as its gross domestic product (GDP) rises steadily.
A.
estimates
B.
anticipates
C.
assumes
D.
tends
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