一般对于一个缺损的生态系统，（）的丧失或改变是影响生态恢复的主要障碍。A.植物种类

It’s important to assess the maturity of enzyme systems (kidney and liver) in which pediatric population before administering medications（）

A. Adolescents.

B. Neonates.

C. Premature infants.

D. Toddlers.

2012年2月山东烟台海阳市发现了三座金元时期古墓，每个墓穴里发现了两个瓷碗和一个瓷器，初步判断，出土文物为宋金元时期的淄博窑烧制的瓷器。宋代是中国瓷器史上的辉煌时代，下列关于瓷器发展状况的描述，不属于宋代的是

A．江南地区成为我国制瓷业重心

B．浙江哥窑的冰裂纹瓷器，美感别致

C．北宋兴起景德镇后来发展成为著名的瓷都

D．越窑青瓷类玉类冰

下列选项中属于我国国有制经济的是 [ ]

A．肯德基连锁店                    

B．陈雨自己开的杂货铺

C．长春第一汽车制造厂              

D．孙跃就职的镇办饲料加工厂

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 一、根据上述信用证，回答下列问题

货物单价

男性，22岁。反复鼻出血、黑便6年，诊断为血小板减少性紫癜。下列不是慢性特发性血小板减少性紫癜特点的是（）。

A.裸核巨核细胞数增多

B.成熟巨核细胞很少

C.末梢血中血小板寿命正常

D.巨核细胞增多

E.颗粒型巨核细胞增多