只出现在DNA分子中的碱基是( )。A.腺嘌呤(A) B.尿嘧啶(U) C.鸟嘌呤

题型:单项选择题

问题:

只出现在DNA分子中的碱基是( )。

A.腺嘌呤(A)

B.尿嘧啶(U)

C.鸟嘌呤(G)

D.胞嘧啶(C)

E.胸腺嘧啶(T)

考点:执业兽医师动物生物化学
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化学纤维制其他男式非内衣式背心

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运动神经元病最常见的类型是()

A.肌萎缩性侧索硬化

B.进行性脊肌萎缩

C.进行性延髓麻痹

D.原发性侧索硬化

E.慢性侧索硬化

题型:单项选择题

某工程施工中由于工程师指令错误,使承包商的工人窝工50个工日,增加配合用工10个工日,机械1个台班。合同约定人工单价为30元/工日,机械台班为360元/台班,人员窝工补贴费12元/工日,含税的综合费率为17%。承包商可得该项索赔为( )元。

A.1260
B.1263.6
C.1372.2
D.1474.2

题型:单项选择题

差异性很大的色彩组合,即()组合。

A.同类色

B.邻近色

C.近似色

D.对比色

题型:单项选择题

With hundreds of millions of electronic (11)taking place daily, businesses and organizations have a p incentive to protect the. (12) of the data exchanged in this manner, and to positively ensure the (13) of those involved in the transactions. This has led to an industry-wide quest for better, more secure methods for controlling IT operations,and for deploying p security mechanisms deeply and broadly throughout networked infrastructures and client devices. One of the more successful concepts to engage the imaginations of the security community has been the development of standards-based security(14) that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in (15) and integrating security provisions at the deepest levels of the machine operation has significant benefits for both users and those responsible for securing IT operations.

空白处(12)应选择()

A.operation

B.completeness

C.integrity

D.interchange

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