下列关于染色体组的叙述,不正确的是() A.染色体组中每种形态的染色体成单存在 B.

题型:单项选择题

问题:

下列关于染色体组的叙述,不正确的是()

A.染色体组中每种形态的染色体成单存在

B.一个染色体组中无等位基因

C.基因型为Aa的个体的体细胞中含有2个染色体组

D.有性生殖的配子细胞中的染色体肯定为一个染色体组

考点:高中生物染色体变异与育种染色体变异与育种题库
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建设项目竣工环境保护验收时,噪声监测因子是( )。

A.A声级

B.总声级

C.倍频带声压级

D.等效连续A声级

题型:单项选择题

确定和调整最低工资标准不会参考就业状况这一因素。()

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货币转化为资本的前提条件是

A.商品价值的实现

B.劳动力成为商品

C.货币积累到一定数量

D.生产资料与劳动者的结合

题型:单项选择题

手机功放电路的性能常用()来衡量。

A、输出功率、工作效率和通频带

B、输出功率、工作效率和失真度

C、输出电压、工作效率和通频带

D、输出电压、工作效率和失真度

题型:单项选择题

Home prices slid in November, raising questions about whether the housing recovery is robust enough to maintain a sustained turnaround. From October to November, home prices fell 0.2% after (1) 0.1% in October, according to a report Tuesday by Standard & Poor’s/Case-Shiller’s home price index. (2) five of the 20 metro areas (3) by the index saw price increases for the month.

On a(n) (4) basis, prices were 5.3% lower in November than in November 2008. Prices were the same as in late 2003. "What we’ve seen (5) the past couple of months is that the pace of (6) has fallen down," says Maureen Maitland of Standard & Poor’s. "Some markets have (7) Is that because we haven’t (8) the foreclosure (回赎权的取消) cycle Because of unemployment We’re not seeing the (9) we were seeing in the last summer months. "

Metro areas that have seen a retreat in home prices (10) Seattle, Charlotte, Las Vegas and Tampa. All four (11) gains they made in recent months (12) . (13) , for the 20-metro index, the annual rate of decline is improving. That (14) , with other recent housing reports that show prices (15) or accelerating, could point to (16) the housing market is starting to (17) its footing, some economists say. Existing home sale prices were $178 300 in December, which is 1.5% higher than December 2008, according to a report this week by the National Association of Realtors. That was the first year-over-year (18) in median price since August 2007.

"The most (19) thing we can say is not only the market is stabilizing, but we’ve seen that housing demand is p," says Bernard Baumohl, with the Economic Outlook Group. "Housing probably will continue to climb upwards through the summer, (20) it could slip a little as the tax credit expires. \

14()

A.trend

B.circumstance

C.condition

D.hypothesis

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