诊断多发性硬化的临床复发，二次发作的间隔时间至少（） A.1周 B.2周 C.数日

阅读理解。

     These days the subject of security (安全) on campus is talked about quite often. Some students' mobile

phones are stolen, some students fight with and hurt one another, and others are knocked down by the fast

running bikes or cars.

     These problems arc common on campus. I think there are three causes for these. Firstly, some students

do not take good care of their properties. They are still young and not careful enough. Secondly, some

students want to do everything well. They want to be the winners in exams, and they also want to be the

winners in fightings. And thirdly, the campus guards (保安) do not carry on their duties well. They don' t

regulate the traffic in the busy hour.

     In order to have a secure campus, all the students should be very careful about their properties. They

should also mind their behaviors (举止) and act politely. The campus guards are supposed to be devoted

(致力于) to the security on campus, and it is their duty to safeguard (维护) a secure campus to help provide

a good environment for the students.

1. According to the passage, some students' _______ are stolen.

A. books

B. clocks

C. knives

D. mobile phones

2. The passage tells us there are _______ causes for the problems.

A. 2

B. 3

C. 4

D. 5

3. Some students want to be the _______ in exams and fightings.

A. players

B. singers

C. winners

D. teachers

4. The underlined word in Paragraph 2 "regulate" means "_______".

A. 关心

B. 维持

C. 赞同

D. 调节

5. This passage is mainly about _______.

A. how to make the campus safe

B. how to protect the students

C. security rules on campus

D. the importance of security campus

有的人是单眼皮，有的人是双眼皮；有的人耳朵有耳垂，有的人无耳垂；有的人能把大拇指向背侧弯曲，有的人不能。上述这些形态结构、生理行为等方面的特性叫做 [ ]

A．遗传

B．性状

C．变异

D．基因

男孩，10个月。1周来发热、咳嗽伴腹泻、呕吐，每天约十余次，伴有嗜睡，继而出现全身性惊厥4次，每次历时1～2min，神志不清。检查：患儿呈昏迷状态，颈软，四肢活动对称，心、肺无异常，肝肋下3.5 cm，质中韧感。查血白细胞数12.0×10⁹/L，中性粒细胞0.70，血小板计数为110×10¹²/L，血糖1.68 mmoL/I，(30mg/dl)，GPT78 u。脑电图的基本电活动为1～2Hz高幅δ波，有时伴两后部阵发性节律性高幅。波活动。其最可能的诊断是

A．瑞氏综合征
B．病毒性脑炎
C．脑中线结构上肿瘤
D．隐球菌性脑膜炎
E．中毒性脑病

进入了初中生活，说明了我们有了新的开端，下列哪句话体现了开端的重要性的？[ ]

A、笑一笑，十年少  

B、瑞雪兆丰年   

C、千里之行，始于足下   

D、家家有本难念的经

FX系列PC的LD指令表示（）。

A、取指令，取用动合触点

B、取指令，取用动断触点

C、与指令，取用动合触点

D、与指令，取用动断触点