电空接触器一般使用在（）电路中。A、主 B、辅助 C、控制 D、信号

已知定义在实数集R上的函数y=f（x）满足：f（x+y）=f（x）+f（y），且f（x）不恒等于零，则y=f（x）是（　　）

A．奇函数

B．偶函数

C．非奇非偶函数

D．不能确定

（1）吸气时的状态是图（  ），此时呼吸肌______，胸廓____________，肺容积__________，肺内气压_________外界气压，气体_________肺部。

（2）呼气时的状态是图（　　），此时呼吸肌_________，胸廓__________，肺容积_____________，肺内气压_____外界气压，气体_____肺部。

My sister Jodie and I are always traveling for work. As jewelry designers, we need to go to a lot of shows. We can’t pack lightly and usually bring about four suitcases filled with our work.

Most of our stuff is made from heavy materials and metals. So part of the routine for us when we fly is getting stopped by security. Our jewelry sets off the alarms, and we’ve become accustomed to arriving early to go through private screenings. Most of the time, it’s not troublesome.

However, on our recent trip to a Paris trade show, we were stopped at security and asked to empty our bags. One of the agents walked over to another agent and they started whispering to each other. Both gentlemen came back, and one of them then told us that it seemed that we were carrying a very dangerous object.

My sister and I just said, “Huh?” Of course, we were a little concerned, thinking that maybe someone put something dangerous in one of our bags when we weren’t looking.

One of the agents then started to unpack our bags. I kept asking what he was looking for and then the object in question finally appeared. It was our Cosima necklace. It’s a piece of jewelry, with large, metal triangular spikes.

My sister and I looked at each other and breathed a huge sigh of relief. We started laughing and explained to the two male agents that it was just a necklace from our collection, not a weapon of mass destruction. They thought we were lying, and one agent kept repeating that he believed it was a weapon.

I tried to explain that we were jewelry designers going to a trade show, and this was simply a piece from our collection. But the agents didn’t buy it. Then a few women guards came over to assist. One of the women guards was holding an earring up to her ear and another was trying on a ring. Apparently, they liked our stuff.

It was only at this point that the male guards gave up. And I think they also got tired of listening to a bunch of women talk about jewelry. They let us through.

We took the names of the women agents and sent them a piece of jewelry when we got back to say thanks.

小题1:When the object in question finally appeared, the writer and her sister felt _______.

A．anxious

B．relieved

C．excited

D．frightened小题2:The writer and her sister were stopped by the agents because ________.

A．their suitcases were too heavy

B．the agents wanted to play a joke on them

C．they were suspected to carry dangerous objects

D．the agents wanted to admire the jewelry inside the suitcases小题3:The underlined word “buy” in Paragraph 7 probably means ________.

A．doubt

B．believe

C．purchase

D．understand小题4:The writer sent the women agents a piece of jewelry in order to ________.

A．persuade them to buy her jewelry later

B．get help from them next time

C．show them her talent in designing jewelry

D．show them her gratitude for their assistance小题5:According to this passage, which of the following statements is NOT true?

A．Someone put something dangerous in one of the writer’s bags.

B．The male agents didn’t believe the writer at first.

C．The female agents liked the jewelry.

D．The writer is always travelling on business.

A narrowing of your work interests is implied in almost any transition from a study environment to managerial or professional work. In the humanities and social sciences you will at best reuse only a fraction of the material (1) in three or four years’ study. In most career paths academic knowledge only (2) a background to much more applied decision-making. Even with a " training " form of degree, (3) a few of the procedures or methods (4) in your studies are likely to be continuously relevant in your work. Partly this (5) the greater specialization of most work tasks compared (6) studying. Many graduates are not (7) with the variety involved in (8) from degree study in at least four or five subjects a year to very standardized job (9) . Academic work values (10) inventiveness, originality, and the cultivation of self-realization and self-development. Emphasis is placed (11) generating new ideas and knowledge, assembling (12) information to make a " rational " decision, appreciating basic (13) and theories, and getting involved in fundamental controversies and debates. The humanistic values of higher (14) encourages the feeling of being (15) in a process with a self-developmental rhythm. (16) , even if your employers pursue enlightened personnel development (17) and invest heavily in " human capital " —for example, by rotating graduate trainees to (18) their work experiences—you are still likely to notice and feel (19) about some major restrictions of your (20) and activities compared with a study environment.

（20）（）

A.hobbies

B.interests

C.subjects

D.concerns

大剂量甲氨蝶呤化疗致口腔溃疡可使用以下哪项来来预防及护理（）

A.呋喃西林漱口液

B.四氢叶酸钙稀释液

C.蛋清

D.锡类散