造成肺心病肺动脉高压最重要的原因是A.缺氧 B.血容量增加 C.二氧化碳潴留 D.毛

题型:单项选择题

问题:

造成肺心病肺动脉高压最重要的原因是

A.缺氧

B.血容量增加

C.二氧化碳潴留

D.毛细血管床减少

E.血液黏稠度增加

考点:临床执业助理医师临床执业助理医师14
题型:单项选择题

等差数列{an}的前n项和为Sn,若a2+a8+a11=30,那么S13值的是(  )

A.130

B.65

C.70

D.以上都不对

题型:单项选择题

支配肾上腺髓质的神经纤维是

A.交感神经节前纤维

B.交感胆碱能节后纤维

C.副交感胆碱能节后纤维

D.副交感神经节前纤维

题型:单项选择题

患者体表面积为1.7m2,输注血小板6袋,每袋含血小板5.5×1010,输入6袋后血小板增加4.5×1010,则CCI值为()。

A.5.5×109/ml

B.1.7×1010/ml

C.2.3×1010/ml

D.4.5×1010/ml

E.6.2×1010/ml

题型:单项选择题

2011年9月29日21时16分,________成功发射,浩瀚太空迎来第一座“中国宫”。由实验舱和资源舱构成。它的发射标志着中国迈入中国航天“三步走”战略的第二步第二阶段。按照计划,神舟八号、神州九号、神舟十号飞船将在两年内依次与它成无人或有人交会对接任务,并建立中国首个空间实验室。[ ]

A.嫦娥一号

B.神舟六号

C.神舟七号

D.天宫一号

题型:单项选择题

With hundreds of millions of electronic (46) taking place daily, businesses and organizations have a p incentive to protect the (47) of the data exchanged in this manner, and to positively ensure the (48) 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 (49) that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in (50) 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.

A. operation B. completeness C. integrity D. interchange

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