改正下列音节的拼写错误，并按照普通话声韵拼合规律加以说明。（1）尖giān（2）疼t

Nina came here lots of times and             she met her aunt.    [ ]

A. finally                  

B. last      

C. hardly                

D. although

近年来，企业面临原材料价格大幅上涨、土地与劳动力成本提高、人民币升值的困境。因此，企业要提高竞争力必须做到

A．调整经营战略，发挥自身优势

B．加强品牌建设，拓展销售渠道

C．依靠技术创新，维持低价竞争

D．多元化生产，降低产品的质量

有关代谢性酸中毒，下列哪项是正确的（）。

A.体内HCO^-₃的减少所引起

B.大量呕吐胃内容物引起

C.体内H₂CO₃增高引起

D.大量利尿引起

E.低钾血症引起

下列哪些投资者视为当然合格投资者（）。

Ⅰ.社会保障基金

Ⅱ.企业年金等养老基金

Ⅲ.依法设立并在中国证券投资基金业协会备案的投资计划

Ⅳ.投资于所管理股权投资基金的股权投资基金管理人及其从业人员

A、Ⅰ.Ⅱ.Ⅲ

B、Ⅱ.Ⅲ.Ⅳ

C、Ⅰ.Ⅱ.Ⅳ

D、Ⅰ.Ⅱ.Ⅲ.Ⅳ

In year X a total of 355 billion dollars was spent for health care in the United States, 30 percent of which was spent by private health insurance companies. Was the amount spent for health care by the federal government’s medicare program less than 60 billion dollars ？（）

(1)In year X medicare spent more than , but less than , of the amount spent by the private health insurance companies for health care.

(2)In year X medicare spent 50 billion dollars less for health care than the amount spent by private health insurance companies.

A．条件(1)充分，但条件(2)不充分．

B．条件(2)充分，但条件(1)不充分．

C．条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．

D．条件(1)充分，条件(2)也充分．

E．条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．