诊断骨髓瘤浆细胞比例标准是（） A.大于5％ B.大于8％ C.大于15％ D.大于

企业下列有关商品期货业务的交易或事项在会计报表的列示中，正确的有()

A.了结商品期货合约实现的平仓盈亏在利润表中单列项目反映

B.交纳的期货保证金期末余额在资产负债表的流动资产项目反映

C.支付的席位占用费期末余额在资产负债的流动资产项目反映

D.取得期货交易所会员资格发生的支出在资产负债表的长期股权投资项目反映

E.转让会员资格而收到的现金在现金流量表的投资活动的现金流量表项目反映

2009年7月22日上午8时左右，发生了本世纪最重要的一次日全食。日食现象可以用我们学过的光的_________道理解释。观察日食时要注意保护眼睛，不能用肉眼或通过没有减光设备的望远镜直接观看，否则容易造成视网膜损伤，甚至失明。比较简易的做法是用一盆滴有墨水的水来观看，如图，这是利用了____________。

全向天线收发水平间距应不小于（）米。

A.3.5

B.4

C.4.5

D.5

收款人可以将( )银行汇票经背书转让给其他单位和个人。

A．未填“现金”字样的

B．未填“可转让”字样的

C．填明“现金”字样的

D．填明“可转让”字样的

根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

                                                   Are Societies Ageing Too Fast?

     An ageing society is one in which the population of people over the age of 60 is increasing. The global

population at present is about 6 billion with l person in every 10 aged 60 or above. 1._____ This will mean

that for the first time in human history the population of older persons will be larger than the population of

children! What are the causes of this population change?

     2._____ And another is that birth rates have dropped as people, especially women, are educated. Measures

to slow population growth like China's one-child policy, have also contributed to lowered birth rates. The

increase in the aged population is not just an interesting trend, however; it also has severe implications for the

future of global economies.

     People traditionally retire at 65 and live on government pensions. 3._____ Another concern is that as medical

expenses increase with age, the demands of the growing aged population will eventually cause medical systems

to face bankruptcy (破产).

     4._____ They suggest that because people are living longer, they ought to work longer, while governments

need to establish a sound social security system. They also suggest that individuals start saving as soon as

possible to ensure a financially secure retirement. People should also develop good health habits in their youth

to ensure an active and productive old age. 5._____ By finding cures for diseases like Alzheimer's and cancer,

medical bills and the need for care would be drastically reduced.

     Finally, an important step to ensure a bright future for all is to do away with negative stereotypes that see

valuable members of society only as pensioners or patients. It's high time we stopped seeing ageing as a disease

and started playing our parts in securing the future of our ageing societies.

A. Due to ageing problem, cities are facing more challenges.

B. Experts insist that steps should be taken now to prepare for the future.

C. As people grow older, a huge financial burden will be placed on the government.

D. Biomedical research is another tool we can use to deal with the problems of ageing societies.

E. One reason is that dramatic health advances have added 20 years to the average life expectancy.

F. The United Nations projects that by 2050, it will be l in every 5.

G. As is known to all, good habits lead to good health.