纯浆液性的腺体是（）。A．舌后腺 B．腭腺 C．腮腺 D．唇腺 E．颊腺

人员横过输送机时，必须停电后方能通过。

实验室用如图装置来制取氧气，请按要求填写；

（1）写出图中有标号的仪器的名称

A______B______C______D______

（2）用带导管的橡皮塞塞住试管口，把导管的一端浸在水里，两手紧贴其外壁，此项操作的目的是______．

（3）若用高锰酸钾来制取氧气时，则要将一团棉花放在试管口的地方此项操作的目的是______．

（4）只有加热到气泡连续地并比较均匀地放出时，才能收集氧气，原因是______．

（5）收集完毕氧气后，先要______，然后再______，否则______．

（6）如果用向上排空气法收集时，如何证明该瓶内的氧气已满：______．

将一小块钠投入滴有石蕊试液的水中，下列有关实验现象的叙述中错误的是（　　）

A．钠浮在液面上

B．钠熔化成小球并在水面上四处游动

C．有气体生成

D．水溶液变为红色

阅读理解。

     New media has been growing fast and influencing people's lives in ways few things have done before

In 2010, China's new media industry witnessed explosive development. But with "new" comes uncertainties

and challenges. The following are brief reviews on the development of China's new media and outlooks on

its future.

     Micro-blogging (微博)

     Short and convenient, micro-blogs also experienced "a big bang" in China last year, with the number of

micro-bloggers at China's popular portal (门户网站) sina.com.cn almost doubling in less than six months.

Afterwards, the other three major web portals, including sohu.com.qq. corn and 163. corn, each set up their

own micro-blogging services. With more government officials and entities (实体) registering, China's micro-

blogging services are expected to play a more important role in connecting the public and the governments in

2011.

     Search Engines

     Baidu's position in the search engine market would face fierce challenges from sohu.com, Microsoft's Bing

and goso.cn from the People's Daily. Xinhua is also preparing to start its search engine together with China

Mobile, a leading company in mobile networks. Goso and Xinhua both have the advantage of providing content,

while Bing has a big edge in technology and funds. They are expected to pose threats (威胁) to Baidu in 2011. 

     Internet of Things

     IoT refers to a network of real-world objects linked by the Internet and interacting through on-line services.

China set up its first IoT research center in Shanghai in March 2010. Within the same week, Premier Wen

Jiabao stated in the annual government report that it would "accelerate the research and development, as well

as application of the Internet of Things."

     However, some experts say China's IoT is still in an early stage, and it'll take a long time for it to let the

public enjoy its full functions.

1. What is the text mainly about?

A. Some major media in China.

B. China's new media and its future.

C. The development of China's on-line services.

D. China's early-stage IoT and its major functions.

2. How many web portals are mentioned in Paragraph 2?

A. Two.

B. Three.

C. Four.

D. Five.

3. Which of the following will be Xinhua's partner to start a search engine?

A. Baidu.

B. Sohu.com.

C. Goso.cn.

D. China Mobile.

4. What does the underlined part "a big bang" in Paragraph 2 probably mean?

A. A deafening sound.

B. An explosive development

C. A terrible damage.

D. A demanding challenge.

提示：患者诉因长期的失眠导致记忆力下降，注意不集中，情绪易激动，如果晚上能睡6个小时以上，所有的不适可以完全消失。平素体健，病前性格开朗。无不良嗜好，无长期服药史。体检正常：未发现精神病性症状。表情自然，偶有心悸、紧张等，对自己的失眠表示担忧，无异常行为。心电图、脑电图检查均正常。SAS，SDS，SCL-90在，正常范围。

理想的安眠药物应具有下列几项特性（）

A.能够产生快速、有效而愉快的入眠

B.抑制慢波睡眠的药物疗效最好

C.不应该延长睡眠至非药物作用期

D.一周内缓慢起效

E.能够维持其有效性至少数厨

F.长半衰期的药物优于短半衰期的

G.当停药时，不应有戒断症状（如反弹性失眠）