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【单选题】
下列关于物种的说法中，错误的是：A.
利用生物表型特征的区别来定义物种是具有遗传学、发育学基础的，其评定标准相对最为统一和被公认。
B.
有关物种的定义一直存在争议，有的科学家认为“物种”是存在的生物学“单位”，有的科学家则认为在一些情况下“物种”不能客观地被定义。
C.
“生物种”的概念由美国生物学家提出，他认为物种是有潜在相互交配能力的自然种群，且其后代可育。这一定义具有较强的科学性，但在鉴定无性生殖的物种和化石物种时具有局限性。
D.
生态种即生存在相同的一个生态龛的个体之和，这一概念强调了生境对物种的作用，但没有充分考虑到平行演化。
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举一反三
【多选题】What are the interviewees advised to do in lesson six if they face a “stumped” question?
A.
Refrain from taking a roundabout way of speaking.
B.
Avoid making up a answer or telling a lie.
C.
Ask for more time to think about it.
D.
Give truthful responses or comments in the answer.
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A.
提供加工劳务的增值税
B.
销售应税消费品应交的消费税
C.
与投资性房地产相关的土地使用税
D.
销售固定资产应交的增值税
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【单选题】The author raises the question 'what about pain without gain?' because ______.
A.
he questions the truth of 'no gain without pain'
B.
he does not think the productivity revolution works
C.
he wonders ff the official statistics are misleading
D.
he has conclusive evidence for the revival of businesses
【单选题】What will happen next?
A.
The store will open for business.
B.
The speaker will answer questions.
C.
Mr. Gering will address the audience.
D.
An information packet will be given out.
【简答题】补全下列对话。 A: What's _____________ name? B: My _____________ is Peter. A: Can I ask you some questions? B: _____________, please. A: _____________ your number? B: I'm _____________ 6. A: What ___________...
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