我们的组件要保证使用（），功率衰减不超过20％。A、1年 B、2年 C、5年 D、2

在牙面最早定居的细菌主要是（）

A.变形链球菌

B.韦荣菌

C.奈瑟菌

D.血链球菌

E.米勒链球菌

根据企业所得税法律制度的规定，下列各项中，纳税人在计算企业所得税应纳税所得额时，不得扣除的有( )。

A．税收滞纳金

B．购建固定资产支出

C．职工基本养老保险费

D．营业税

六氯苯是联合国有关公约禁止使用的有毒物质之一。下列结构简式中能表示六氯苯的是 [ ]

A.

B.

C.

D.

影响教育规划与预测的经济因素有哪些

根据课文内容用适当的词填空，使短文完整。(一空一词)

    The Amber Room, 1.______ was made of seven thousand tons of amber with gold and jewels,

was 2.______ to be the best and biggest work of amber ever 3.______.It 4.______ a team of

best artists in Prussia ten years to make it.

    In 1716, Frederick William I presented the Amber Room to Peter the Great, 5.______ a

gift of friendship from the Prussian to the Russian people. About four meters long,the

Room 6.______ as a small reception hall in the Czar's winter palace in St Petersburg. Late

r, Catherine Ⅱ had the Room moved outside St Petersburg and also had it 7.______, 8.______

more details to its design. In 1770, the Room was completed the 9.______ she wanted, with

almost 600 candles 10.______ the room and scores of mirrors and pictures shining 11.______

gold.

    But sadly, the Amber Room, one of the great 12.______ of the world, got lost during

the war 13.______ Russia and Germany in 1941. The Russians weren't able to remove the Room

14.______ the Nazi German army got to summer palace. Some of the Nazis secretly stole

the Room,taking it by train to a German city. After that, what 15.______ to the Amber Room

remains a mystery.