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问题 选择题

鸡卵的结构中，将来 育成雏鸡的是

A．卵白

B．卵黄

C．胎盘

D．胚盘

答案

答案：D

题目分析：胚盘是进行胚胎发育的部位．鸡卵的结构，由外向内依次是卵壳、卵壳膜、气室、系带、卵黄膜、卵黄、胚盘等．雏鸡由胚盘发育而来，胚盘是由受精卵分裂发育而来，为卵黄表面中央一盘状小白点，是胚胎发育的部位．胚胎发育的营养是由卵黄提供，鸡卵生殖发育过程：受精卵→胚盘→雏鸡，未受精的卵，胚盘色浅而小；已受精的卵的胚盘色浓而略大，这是因为胚胎发育已经开始．胚胎是由胚盘发育形成的；卵黄是胚胎发育的主要营养物质来源；卵白为胚胎发育提供营养物质和水．

多项选择题

下列哪些情形构成走私行为( )

A．运输、携带、邮寄国家禁止或限制进出境货物、物品或者依法应当缴纳税款的货物、物品进出境的

B．进出口货物、物品或者过境、转运、通运货物向海关申报不实的

C．未经海关许可并且未缴纳应纳税款、交验有关许可证件，擅自将保税货物、特定减免税货物以及其他海关监管货物、物品，进境的境外运输工具：在境内销售的

D．进出境运输工具，未经海关同意，擅自兼营或者改营境内运输的
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Questions


·You will hear five conversations taking place in restaurants and the customers are complaining about something.
·Before you listen, read the list of statements, five of which are summaries of how these problems are solved.
·Then listen carefully and match the statements (A-F) with the conversations that are about them respectively.
·There is one extra statement that you don’t need to use. You will hear the passage twice.
A. it is suggested that she change her order to some sirloin because it is tender.
B. She is asked to send in the bill if she likes to have it cleaned.
C. The head waiter goes to fetch some clean ones immediately.
D. He offers to sponge it with a little warm water.
E. He is advised to choose another wine instead.
F. The head waiter will deal with it himself.

Questions


·You will hear five conversations taking place in restaurants and the customers are complaining about something.
·Before you listen, read the list of statements, five of which are summaries of how these problems are solved.
·Then listen carefully and match the statements (A-F) with the conversations that are about them respectively.
·There is one extra statement that you don’t need to use. You will hear the passage twice.
A. it is suggested that she change her order to some sirloin because it is tender.
B. She is asked to send in the bill if she likes to have it cleaned.
C. The head waiter goes to fetch some clean ones immediately.
D. He offers to sponge it with a little warm water.
E. He is advised to choose another wine instead.
F. The head waiter will deal with it himself.
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