下列微生物中具有独特的发育周期的是（） A.支原体 B.衣原体 C.立克次体 D.钩

患者男性，16岁，因严重先天性胸椎后突和侧突畸形入院，拟行脊柱畸形矫正术。

提示：术前访视发现患者有较严重的限制性通气障碍，且有急性肺部感染，咳嗽、咳痰明显，体温38．7℃；WBC1．3×10⁹／L，N87％；血气分析：PaO₂55mmHg，PaCO₂55mmHg，SpO₂82％，pH值7．3。提问：根据患者的病情，下列哪些措施是正确的？（）。

A.暂缓手术，积极控制肺部感染，纠正呼吸衰竭

B.立即手术，矫正畸形，解除胸廓运动限制，改善呼吸功能

C.肺部感染急性症状控制后2周以上才能进行麻醉和手术

D.单独采用硬膜外麻醉完成手术，以免造成呼吸系统并发症

E.术前训练深呼吸、咳嗽排痰。进行术中唤醒训练

F.术前施行低蛋白、低热量和低钠饮食

对引文(钱学森的话)理解最准确的是( )

A．这是对灵感思维的功能和作用的科学评价

B．这是对理性思维的功能和作用的合理估价

C．这是对思维科学研究“禁区”的挑战

D．这是对科学思维方法的精要概括

A市甲企业欠乙企业货款200万元，由某城市银行A市支行提供担保。乙企业从丙处购得价值188万元的机床一台，和丙协商后，以自己对甲的债权充抵机床价款，并征得了A市支行的同意。乙和丙约定若发生纠纷，则以协议订立地B市法院为管辖法院。后甲在履行债务时和丙发生纠纷，丙向甲营业地C市法院提起诉讼，要求甲偿还债务。甲对丙的债权表示异议。参照案情回答以下问题：

可以以哪些方式使乙参加诉讼( )

A．由乙自己向法院提出申请

B．由法院依职权追加

C．由丙申请法院追加

D．由甲申请法院追加

(B)

You can tell the age of a tree by counting its ring. But these records of a tree’s life really say a lot more. Scientists are using tree ring to learn what’s been happening on the sun’s surface for the last ten thousand years. Each ring represents a year of growth. As the tree grows, it adds a layer to its trunk, taking up chemical elements from the air. By looking at elements in the rings from a certain years, scientists can tell what elements were in the air that year. Dr. Stevenson is analyzing one element, carbon-14, in ring from both living and dead tree. Some ring go back almost ten thousand year to the end of the Ice Age. When Stevenson followed the carbon-14 levels changed with the intensity of solar burning. You see, the sun has cycles. Sometimes it bums fiercely, and at other times it is relatively calm. During the sun’s violent periods, it throw off charged particles in fast moving streams called "solar winds". The particularly interfere with the formation of carbon-14 on earth. When there is more solar wind activity, less carbon-14 is produced. Ten thousand years of tree ring show that the carbon-14 level rises and falls about every 420 years. The scientists concluded that solar wind activity must follow the same cycle.

What do we learn from the passage about solar wind activity（）

A. It affects the growth of trees.

B. It has been increasing since the Ice Age.

C. It is determined by the chemicals in the air.

D. It follows a certain cycle.

( )是中国特色社会主义的本质属性。

A．民主法治
B．社会和谐
C．公平正义
D．安定有序