皮皮学，免费搜题
登录
搜题
【单选题】
已知反应 B→A和B→C所对应的等压反应热分别为ΔH 2 和 ΔH 3 ,则反应 A→C的ΔH 1 为 ( )A.
ΔH 1 = ΔH 2 + ΔH 3
B.
ΔH 1 = ΔH 2 - ΔH 3
C.
ΔH 1 = ΔH 3 – ΔH 2
D.
ΔH 1 = -ΔH 2 - ΔH 3
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Actually, information technology ____ the gap between the poor and the rich because all can get what they want at the same time. [ ]
A.
breaks
B.
fills
C.
bridges
D.
combines
【简答题】某企业3月份发生下列经济业务,要求为下列经业务编制会计分录(凡能明确明细科目的,应在分录中列出)。 (1)企业购入甲、乙两种材料。其中甲材料200公斤,单价90元;乙材料300公斤,单价40元,增值税进项税额5100元。甲、乙两种材料已运达企业但尚未验收入库,款项已用银行存款支付。
【简答题】某企业3月份发生下列经济业务,要求为下列经业务编制会计分录(凡能明确明细科目的,应在分录中列出)。 (1)企业购入甲、乙两种材料。其中甲材料200公斤,单价90元;乙材料300公斤,单价40元,增值税进项税额5100元。甲、乙两种材料已运达企业但尚未验收入库,款项已用银行存款支付。
【单选题】What can be inferred from the passage?
A.
A person with a poor memory lives forever in the present.
B.
We were either born with a good memory or not.
C.
Human beings have the potential to learn a foreign language.
D.
Illiterate people usually have a poor memory.
【简答题】企业购入甲、乙两种材料。其中甲材料 200公斤,单价90元;乙材料300公斤,单价40元,增值税进项税额5100元。甲、乙两种材料已运达企业但尚未验收入库,款项已用银行存款支付。
【单选题】购入甲材料300公斤,200元/公斤,乙材料200公斤,300元/公斤,支付运费2000元,整理费300元,保险费700元,按照购入金额分配杂费,则乙材料购入单位成本为
A.
300
B.
61500
C.
307.5
D.
306
【单选题】What can we infer from the third paragraph?
A.
Poor students often come from poor families.
B.
Fewer jobs are available to the poor readers now than before.
C.
Some researchers were once poor students at school.
D.
School underachievers only have job chances before the age of 37.
【单选题】What _____ things can you think of to help the poor? [ ]
A.
other
B.
the other
C.
others
D.
another
【简答题】extern“C”有什么作用?
相关题目：