下列病害的病原物属原核生物类的有（）。A.稻曲病 B.水稻细菌性条纹病 C.柑桔溃疡

试阅读下面一段文字，然后概括创新需具备的条件。（不超过15个字）

　　创新不光是要胆子大，科学的发展还必须要有坚实的 根基。宇称守恒定律也是有它的根基的，是前人用实验证明了的。创新两个字包含了两层意思，即好的和新的东西。凡是新的东西都把旧的包在里面，用所有过去的知识都能解释得通，所以，创新不光要大胆，还要具备分析的能力。

答：________________________________________________________________________ 。

Under normal conditions the act of communication requires the presence of at least two persons: one who sends and one who receives the communication. In order to communicate thoughts and feelings, there must be a conventional system of signs of symbols which mean the same to the sender and the receiver.

The means of sending communications are too numberous and varied for systematic classification, therefore, the analysis must begin with the means of receiving communication. Reception of communicatio isachievedbyourenses.Sight,hearing,andtouch play the most important roles. Smell and taste paly very limited roles, for they cannot receive intellectual expression from fully developed systems of signs and symbols        

Examples of visual communication are gesture and mimicry (模仿). Although both frequently ac- company speech, there are systems that rely solely on sight, such as those used by deaf and dumb per- sons. Another means of communication visually is by signals of fire, smoke, flags and flashing lights. Feelings may be simply communicated by touch, such as by handshaking or backslapping, although a highly developed system of handstriking has enabled blind, deaf, and dumb persons to communicate intelligently. Whistling to someone, applauding in a theater, and other forms of communication by sound rely upon the ear as a receiver. The most fully developed form of auditory communication is, of course, the spoken language.

The means of communication mentioned so far have two features in common: they last only a short time and the persons involved must be relatively close to each other. Therefore, all are restricted in time and space.

64. The author explains he will deal with reception of communication first because   

A. communication actually takes place when the message is received

B. there are more means of receiving than of sending cmmunication

C.reception of communications involves use of the senses

D.it is difficult to organize by type the means of sending communication

65. Persons who cannot see, hear, or speak are able to communicate through a system of

A. gesturing       B. handshaking      C. backslapping       D. handstriking

66. A form of visual communication often used with a type of auditory communicati      

A. gesturing     B. handshaking        C. backslapping       D. handstriking

67. The author specifically mentions that speech is

A. often used when communication by touch

B. necessary for satisfactory communication by gesture

C. the only highly developed system of communication

D.the most developed form of communication based on hearing

68.Which of the following statements about communication by touch is true?

A. Touch is less important than taste as a means of communication.

B. There is no well-developed system of communication based on touch.

C. It is possible to communicate intelligently by touch alone.

D. Touch must accompany visual communication.

中央型骨纤维肉瘤的主要X线表现（）

A.边缘模糊的溶骨性破坏，周围呈筛孔样改变

B.多骨多发性溶骨性骨破坏，同时可伴有内脏和软组织的多发肿瘤

C.骨旁软组织肿块和邻近部位的骨皮质毛糙，压迫性缺损

D.瘤区内无明显骨化及钙化，一般无骨膜反应

E.生长缓慢者破坏区可见囊状，甚至膨胀性骨破坏

针对不同的传输介质，Ethernet网卡提供了相应的接口，其中适用光纤的网卡应提供( )。

A．AUI接口

B．BNC接口

C．P/O接口

D．RJ-45接口

下列哪项不是临床死亡期的特征（）

A．呼吸停止

B．心跳停止

C．各种反射消失

D．延髓处于深度抑制状态

E．组织细胞新陈代谢停止