搜题请搜索小程序“爱下问搜题”
问题 选择题

下列哪种动物的生殖发育过程，受水环境污染影响最大的是（     ）

A．蝗虫

B．青蛙

C．蜂鸟

D．家兔

答案

答案：B

题目分析：雌蛙和雄蛙经过抱对，分别把精子和卵细胞排放到水中，精子和卵细胞在水中结合，形成受精卵。青蛙的发育过称为：受精卵→蝌蚪→幼蛙→成蛙，蝌蚪生活在水中，所以青蛙的生殖发育都离不开水，家蚕、蜂鸟、家兔的生殖发育不是在水中，因此青蛙受水环境污染影响最大。故选：B

单项选择题

骨髓穿刺的禁忌证为

A．疑为血液病患者

B．血小板明显减低者

C．有出血倾向者

D．严重的再生障碍性贫血

E．血友病患者
查看答案
填空题


The ABC Bank
Irrevocable documentary credit
Number: LC123—258866
Date: August 24, 1999
Date and place of expiry: October 30, 1999 China
Advising bank: Bank of China
Beneficiary: China XYZ import and export corp.
Applicant: UVW corporation.
Amount: USD52, 500(Say U. S Dollars fifty two thousand five hundred only)
We hereby issue irrevocable documentary credit which is available with:
Any bank
By negotiation of beneficiary’s drafts at sight
For full invoice value
Drawn on the ABC bank
Partial shipments: Not allowed
Transshipment: Not allowed
Shipment from: Shanghai
To: Tokyo Japan
At the latest: October 15, 1999
Following documents required:
+Signed commercial invoice in three copies
+Full set of clean on board ocean bill of lading
+Weight certificate in two copies
Covering: 100 metric tons(5PCT MOL)of XY chemical in drums at USD 500 per M/T.
Special instructions: Insurance to be effected by buyer.
Instructions to advising bank: Please advise this credit to the beneficiary
We hereby undertake that drawers, endorsers in compliance with the terms of this credit will be duly honored upon presentation to the drawee bank.
Authorized signature
根据上述信用证，回答下列问题

装船期限
查看答案