皮皮学，免费搜题
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【多选题】
生物质能的利用主要有哪些途径（）？A.
直接燃烧
B.
热化学转换
C.
循环利用
D.
生物化学转换
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Why is Harry shown as not being able to write the story of the boy?
A.
To summarize the regrets of his life
B.
To show his lack of confidence in writing
C.
To emphasize his guilt of betraying the boy
D.
To show that Harry has lost his creativity
【单选题】在属性选择器中 ,对于属性class中值包含a1单词的添加样式:文字颜色为蓝色的代码是( )
A.
[class]{color:blue}
B.
[class="a1"]{color:blue}
C.
[class~="a1"]{color:blue}
D.
[class$="a1"]{color:blue}
【多选题】一般而言,企业经营活动净现金流小于零意味着( )。
A.
应收账款回款较差
B.
企业投入较多资金推广产品
C.
企业的预收账款较高
D.
企业议价能力较差，需要支付供应商较高的现金去购买原材料
【简答题】蓝色的代码单词是( )
【单选题】Why is Harry shown as not being able to write the story of the boy?
A.
To emphasize his guilt of betraying the boy
B.
To summarize the regrets of his life
C.
To show that Harry has lost his creativity
D.
To show his lack of confidence in writing
【简答题】D/A指信号从数字量转换成___________。
【简答题】A/D指信号从___________转换成___________。反之,D/A指信号从数字量转换成模拟量。
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