LiFePO4新型锂离子动力电池以其独特的优势成为奥运会绿色能源的

【名词&注释】

锂离子动力电池(lithium-ion batteries)、奥运会(olympic games)、净资产收益率(return on net assets)、资产负债率(asset-liability ratio)、化合价(valence)、总资产周转率(total assets turnover ratio)、流动资产周转率(turnover of current assets)、总资产报酬率(rate of return on total assets)

[单选题]LiFePO4新型锂离子动力电池以其独特的优势成为奥运会绿色能源的新宠，已知P的化合价为+5价，则LiFePO4中Fe的化合价为

A. +1
B. +2
C. +3
D. +4

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举一反三：

[单选题]From the passage, we know that __________.

A. there was not enough food in Ilan long ago
B. leftovers can’t be used to cook delicious food
C. zao bing is a famous dish without any fat in it
D. the writer is interested in very big banquets

[单选题]50．—could you take care of our dog while we are away?—__________

A. With pleasure
B. It's my pleasure
C. Never mind
D. That's all right

[多选题]评价企业资产运营状况的指标包括（ ）。

A. 总资产报酬率^{(rate of return on total assets)}
B. 总资产周转率^{(total assets turnover ratio)}
C. 流动资产周转率^{(turnover of current assets)}
D. 净资产收益率
E. 资产负债率

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