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轴的安全系数校核计算主要包括哪些内容？

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在原肠胚形成过程中，没有进入胚胎内部，留在胚胎表面的细胞属于（）。

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女性，50岁。乏力，活动后气急2年，近1月来出现腹部胀大伴下肢水肿入院。以往有乙型肝炎，体检：巩膜黄染，心界向两侧扩大，心尖搏动及第一心音减弱，心尖区有Ⅲ级收缩期杂音，两肺底少量湿性啰音。腹水明显，肝脾无法扪清，下肢水肿。血压120/70mmHg。肝功测定结果：TB20μmol/L，CB8μmol/L，ALT40U。心电图V₁～V₅呈rS。入院后给予西地兰及速尿、静滴硝酸甘油，呼吸困难好转。10天后随访心电图示高度房室传导阻滞，心室率60次／分，频发多源性室性早搏，血钾4.5mmol/L，此时考虑（）

A. 洋地黄中毒
B. 心衰合并室性早搏
C. 电解质紊乱
D. 心衰加重
E. 洋地黄用量不足
F. 速尿过量

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《气象探测环境和设施保护办法》第九条规定所称源体，是指省级气象主管机构确定的对气象探测资料的（）有影响的大型锅炉、废水、废气、垃圾场等干扰源或者其他源体。

A. 代表性
B. 准确性
C. 比较性
D. 连续性

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Your network contains an Active Directory forest named contoso.com. You plan to deploy a new child domain named branch.contoso.com. The child domain will contain two domain controllers. Both domain controllers will have the DNS Server server role installed.All users and computers in the branch office will be members of the branch.contoso.com domain.You need to plan the DNS infrastructure for the child domain to meet the following requirements： èEnsure resources in the root domain are accessible by fully qualified domain names. èEnsure resources in the child domain are accessible by fully qualified domain names. èProvide name resolution services in the event that a single server fails for a prolonged period of time. èAutomatically recognize when new DNS servers are added to or removed from the contoso.com domain. What should you include in your plan？（）

A. On both domain controllers， add a conditional forwarder for contoso.com and create a standard primary zone for branch.contoso.com.
B. On both domain controllers， modify the root hints to include the domain controllers for contoso.com. On one domain controller， create an Active Directory-integrated zone for branch.contoso.com.
C. On one domain controller create an Active Directory-integrated zone for branch.contoso.com and create an Active Directory-integrated stub zone for contoso.com.
D. On one domain controller， create a standard primary zone for contoso.com. On the other domain controller， create a standard secondary zone for contoso.com.

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