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【单选题】
生物分类的最基本单位是种。下列对种的有关叙述,正确的是( )A.
同种生物的亲缘关系最远
B.
同种生物的共同特征最少
C.
一个物种就是一个生物
D.
一个物种就是一种生物
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皮皮学刷刷变学霸
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【单选题】用最小平方法配合直线方程,必须满足的一个基本条件是()。
A.
∑(y-yc)^2为最小值
B.
∑(y-yc)^2为最大值
C.
∑(y-yc)为最大值
D.
∑(y-yc)为最小值
【简答题】7月17日中国某出口公司A向荷兰B公司电报发盘：“售300吨农产品C514即期装船，不可撤销即期信用证付款，每吨CIF鹿特丹USD 900，7月25日前电复有效。”B公司于7月22日复电如下：“你7月17日发盘，我接受300吨C514，即期装船，不可撤销即期信用证付款，每吨CIF鹿特丹USD 900，除通常的装运单据以外，要求提供产地证、植物检证明书、适合海洋运输的良好包装。”A于7月25日复电如...
【简答题】三次平行试验的平均值的计算公式是_____________________________。
【单选题】What can be inferred about Dr. Softer from paragraph 2?
A.
She does not agree that women should be the primary caretakers for children.
B.
She is probably not as conservative in her views as many of her colleagues.
C.
She is most likely a biologist who is doing research on European women.
D.
She has recently begun studying hunting and gathering in the Upper Paleolithic era.
【简答题】A．She set a new record of flying from Europe to India. B．She proved women could fly as well as men could. C．Her flight was the longest one ever made by human being till then. D．She flied at the highes...
【单选题】Statistics indicate that women are ________ shoppers in Europe, contributing to fourfifths of annual online shopping sales.
A.
enthusiastic
B.
potential
C.
traditional
D.
intelligent
【简答题】期待很快听到您的决定,希望再次见到您。
【单选题】Most Asian women try to be shaded from the sun while touring in Europe in summer, fearing that the strong sunshine may ______ the aging process of their skin.
A.
accumulate
B.
protect
C.
accelerate
D.
develop
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