M600设备OTU单板有以下（）种A、OTUp（单路保护） B、OTUb（单路双向）C

骨肉瘤病人可出现（）

A.血酸性磷酸酶升高 

B.血碱性磷酸酶升高 

C.血CEA高 

D.血AFP升高 

E.血VCA—IgA抗体升高

阅读下面短文，请从方框中选出适当的句子填入文中的适当位置，使短文内容完整正确。

     The earth moves around the sun,  and the moon moves around the earth.    When our part of the

earth turns to the sun, it is day.   When our part of the earth turns away from the sun, 1_____The

sun is much bigger than the moon.   But sometimes the moon looks bigger than the sun, 2_____

The sun is very bright.3_____The moon looks quite bright, too.4_____ The moon looks much

bigger and brighter than the stars. 5_____ They look smaller than the moon because they are

much farther away from us.

A. But actually the stars are much bigger and brighter than the moon.

B. it is night.

C. It gives a very strong light.

D. because it's much nearer to the earth.

E. But it doesn't give any light at all.

Austin-Flint杂音的发生与以下哪项有关（）

A.二尖瓣狭窄

B.二尖瓣关闭不全

C.主动脉狭窄

D.主动脉关闭不全

E.肺动脉关闭不全

甲企业为国有工业企业，因经营管理不善，造成严重亏损，无法清偿到期债务。甲的债权人乙公司向法院申请宣告甲企业破产。乙公司提出破产申请时，应提交以下证据材料：()。

A．债权发生事实及有关证据

B．债权性质、数额、有无担保，并附证据

C．债务人不能清偿到期债务即停止支付到期债务并呈连续状态的有关证据

D．上级主管部门同意其破产的文件

高炉突然停水时，炉前应立即组织出铁，减少炉内（），减少冷却设备的损坏。