PLC扫描是按照梯形图网络号（）顺序进行逻辑处理。 A.自下而上，由左及右 B.自下

“Homestay is a form of study abroad program. It allows the visitor to rent a room from a local family to better understand the local lifestyle. It also helps to improve the visitor’s language ability,” said a teacher during a school meeting last term, “Students who wish to learn more about foreign cultures or to get foreign experience should join this kind of holiday. I am sure you won’t be disappointed(失望的).”

After this special meeting, I always thought about this kind of holiday. Last month, I had a chance at last to go on such a holiday with some of my schoolmates and we went to London, a place where I had wanted to go since years ago.

As we were still young, we had a group leader who planned things for us and looked after us. After we got to London, we went  to stay with different families. I was lucky that my host family(寄宿家庭) was a white couple who had a daughter about my age. They treated me as a daughter of their family during my stay there. They were interested in me and I learnt a lot of things from them, too.

The holiday was filled with activities every day. After breakfast, a local teacher would come to take us in his car. Then we would have classes or go on a sight-seeing trip to different places of interest like the Big Ben, the London Bridge, and the Buckingham Palace. We would go back to our own homes after the activities.

The holiday was a valuable experience for me. I enjoyed every minute of it. Yet, time really flew fast. Three weeks later, we had to leave “home” for Hong Kong.

小题1:In the “homestay” program, a visitor can              .

A．learn more about holidays

B．understand his culture better

C．improve the language ability

D．take part in foreign meetings小题2:The writer had wanted to visit London since              .

A．the last month

B．years ago

C．the special meeting

D．her stay abroad小题3:The group leader should             .

A．make plans for the family

B．take care of the students

C．stay with different families

D．rent rooms to the students小题4:The writer’s host family              .

A．was very kind to her

B．went sight-seeing with her

C．had two white daughters

D．was interested in her activities小题5:From the passage, we know that the writer             in London.

A．wished to stay a little longer

B．spent three weeks in her “home”

C．had classes in many interesting places

D．helped the teacher take the students in a car

下列生物中不具有细胞结构的是[ ]

A．EV71病毒

B．植物花粉

C．草履虫

D．动物骨

在AWT包中，创建一个具有10行，45列的多行文本区域对象ta的语句为【 】。

持有过量现金可能导致的不利后果是( )。

A．财务风险加大

B．收益水平下降

C．偿债能力下降

D．资产流动性下降

艾滋病是（）

A.一种性病

B.一种血液病

C.获得性免疫缺陷综合征

D.同性恋病

E.病毒