单选题GIF files are limited to a maximum of 8 bits/pixel, it simply means that no more than 256 colors are allowed in ______. A．an image B．a file C．a window D．a page

单选题A: Why were only three of you present at the meeting? B: ______.

单选题(Thirteen hundred) medical professionals, (all of which) have been trained to treat drug dependency, (attended) the annual convention (sponsored) by a society.

单选题The research scientists often meet with problems______new types of instruments for their solution.

单选题As many office workers adapt to remote work, cities may undergo fundamental change if offices remain under-utilized. Who will benefit if working from home becomes the norm? Employers argue they make considerable savings on real estate when workers shift from office to home work. However, these savings result from passing costs on to workers. Unless employees are fully compensated, this could become a variant of parasitic (寄生的) capitalism, whereby corporate profits increasingly rely on extracting value from the public—and now personal—realm, rather than on generating new value. Though employers are backed by a chorus of remote work advocates, others note the loneliness, reduced productivity and inefficiencies of extended remote work. If working from home becomes permanent, employees will have to dedicate part of their private space to work. This requires purchasing desks, chairs and office equipment. It also means having private space dedicated to work: the space must be heated, cleaned, maintained and paid for. That depends on many things, but for purposes of illustration, I have run some estimates for Montreal. The exercise is simple but important, since it brings these costs out of the realm of speculation into the realm of meaningful discussion. Rough calculations show that the savings made by employers when their staff works from home are of similar value to the compensation workers should receive for setting up offices at home. What does this mean for offices in cities? One of two things may happen: Employers pass these costs onto employees. This would be a form of expropriation (侵占), with employees absorbing production costs that have traditionally been paid by the employer. This represents a considerable transfer of value from employees to employers. When employees are properly compensated, employers’ real estate savings will be modest. If savings are modest, then the many advantages of working in offices—such as lively atmosphere, rapidity of communication, team-building and acclimatization (适应环境) of new employees—will encourage employers to shelve the idea of remote work and, like Yahoo in 2013, encourage employees to work most of the time from corporate office space.

单选题We are using up our natural resources too quickly and at the same time we are ______ our environment with dangerous chemicals.

单选题On hearing the bad news, he got up quickly, ______ the lunch unfinished.

单选题A: I'm sorry I'm calling you so late.B: ______okay.

单选题The federal court has been putting pressure on the state to adhere to the population caps in the decree.

单选题The main reason for the fast growth of population is not ______ a rise in birth rates as a fall in death rates as a result of improvements in public health service and medical care. A. such B. the same C. so much D. as much

单选题The word "interim" most probably means ______.

单选题The principal duty of the United Nations is to safeguard the peace of the world.

单选题Rite of Passage is a good novel by any standards; ______, it should rank high on any list of science fiction. A. consistently B. consequently C. invariably D. fortunately

单选题Sarah: Hello. Im calling to rent an apartment you advertised.Manager: Yes. What kind of apartment are you interested in?Sarah: I m interested in a one-bedroom apartment. 56__________?Manager

单选题Tom: Dad! Tom’s broken a glass!Tom: Dad! Tom’s broken a glass!Mike: ________ . Accidents will happen.

单选题Don"t come today. I would rather you ______ tomorrow.

单选题There are so many bad things about women driver's, I don't know where to staff. I guess I will get the ball rolling by talking about one of my biggest pet peeves. Why do women have to wait until they are in the car and barreling down the highway at sixty miles an hour before they decide it is time to put on their makeup? Is there a law that 1 don't know about that says women have to do their makeup in the car because the bathroom isn't good enough for them? I don't know if anyone has ever informed women, but the mirror in the car is not a makeup mirror. The mirror is used for looking at other cars and pedestrians. So please do us all a favor and do your makeup before you leave the house. The next order of business for the men should be to find out whose brilliant idea it was for women to have a phone in the car. This has disaster written all over it. Everyone knows that women can't even walk and chew gum at the same time, so how in the hell are they going to drive and talk on the phone? Why is it that every time you are sitting at a red light the woman in front of you thinks this is a good time to make a phone call? "HELLO LADY THE LIGHT IS GREEN, GET OFF THE PHONE AND GO!" I really think we need to outlaw women using their cell phones while they drive. Another accident waiting to happen is when you get two women in the same car together. How many times have you seen two women just yakking away and the driver isn't paying attention to where she is axe talking and the driver doesn't see the stop sign in front of her, so she runs it. Two: The two women are talking and at the last minute the driver realizes there is her turn, so she stops really quick in front of you and you almost rear-end her. So women please pay more attention to your driving and, for the love of God, use your turn signals——they aren't there for decoration. I know all women out there are yelling at me and saying, "Women are better drivers than guys." If women were better drivers than men, why do guys drive on dates? Why don't women ever tell the guy, I will come pick you up? Why are almost all truck drivers guys? Why is it when a woman is going to move and she rents a U-Haul van, she always calls a guy to drive it for her? When was the last time you watched a woman win the Indy 500 or Daytona 500? All of these questions just go to prove why guys are the kings of the road.

单选题Stressful environments lead to unhealthy behaviors such as poor eating habits, which ______ increase the risk of heart disease.

单选题根据下面资料，回答21-35题。In the past， I always thought that being a teacher was an easy job. But I changed my（21）when I became a part-time teacher. About four years ago， Richard asked me（22）I could help teach