LNG在接收热量后将导致一些液体蒸发为气体，即蒸发气体（BOG，boil off g

在关系数据库中，参照关系和被参照关系是以（）相关联的两个关系。

航空公司各分公司缴纳营业税的地点是 ( )。

A．总公司所在地
B．分公司所在地
C．总、分公司任选一处
D．税务机关核定

Feeling anxious Your mood may actually change how your dinner tastes, making the bitter and salty flavors recede, according to new research. This link between the chemical balance in your brain and your sense of taste could one day help doctors to treat depression. There are currently no on-the-spot tests for deciding which medication will work best in individual patients with this condition. Researchers hope that a test based on flavor detection could help doctors to get more prescriptions right first time.

It has long been known that people who are depressed have lower-than-usual levels of the brain chemicals serotonin or noradrenaline, or in some cases both. Many also have a blunted sense of taste, which is presumably caused by changes in brain chemistry. To unpick the relationship between the two, Lucy Donaldson and her colleagues at the University of Bristol, UK, gave 20 healthy volunteers two antidepressant drugs, and checked their sensitivity to different tastes. The drug that raised serotonin levels made people more sensitive to sweet and bitter tastes, the team reports in the Journal of Neuroscience. The other, which increased noradrenaline, enhanced recognition of bitter and sour tastes.

In healthy people, volunteers whose anxiety levels were naturally higher were less sensitive to bitter and salty tastes. "What hasn’t been done beore is to look precisely at which tastes are affected in depression," says Donaldson. Now the results are in, "we can discriminate between the chemicals and the tastes that seem to be altered," she says. Testing sensitivity to sweet and sour tastes could potentially help doctors to pick up on which chemicals are dipping, guiding them when choosing which drug to rectify the problem.

Currently, doctors rely on physical and emotional symptoms to make a best guess at an individual’s imbalance, prescribe a drug and wait about a month to check on any improvement. Good doctors have about a 60-80% success rate in selecting the right drug the first time, says psychiatrist Jan Melichar, a co-author on the paper. Are there any decent tests for prescribing drugs for depression "No. We do a best guesstimate," says Melichar. "I’m excited by this finding because in 3, 5 or 7 years we could have a simple taste test. "

Next, the team plans to perform similar tests in depressed people, and in healthy volunteers given another brain chemical called tryptophan. This chemical would lower the healthy subjects’ levels of serotonin, as actually happens in depressed patients.

The work has also generated interest from flavor houses--companies that develop chemicals for the food and drink industry--who are interested in making foods taste just as sweet with half the amount of sugar. "Theoretically there would be the possibility of enhancing your meal with drugs that affect brain chemicals so that things would taste better--you couid have a ’designer taste tablet’," Donaldson says.

Which of the following is TRUE as to the results of the research（）

A. Increased serotonin weakens sensitivity to the tastes of bitter and sour

B. The more anxious people are, the more sensitive to sour taste

C. The tryptophan can add healthy people’s serotonin amount

D. The tryptophan can lower healthy people’s serotonin level

营业时间不得拒办应办的各项业务，不得人为中断营业工作。对关门时滞留在营业场所内的用户，应当（）。

A.予以办理业务

B.停止办理业务

C.劝离营业厅

D.告知用户已停止营业

甲公司与乙公司（建筑企业）于2001年4月签订了一份买卖合同，约定2001年8月30日由甲向乙提供建筑用水泥100t。同年5月初，甲公司所在地发生洪水灾害，甲公司未将灾情之事通知乙公司。同年8月底，乙公司催促交货，甲公司未交。同年9月30日，甲公司发货，同时致函乙公司，表明因受水灾而致延迟交货的事实。乙公司因延期收到水泥而影响工程进度，被发包方扣罚工程款1万元。则正确的是（）

A.甲公司因不可抗力延迟交货，对乙公司扣罚的1万元不承担赔偿责任

B.甲公司因不可抗力延迟交货，对乙公司扣罚的1万元承担部分赔偿责任

C.甲公司在取得主管机关有关灾情后，免予承担赔偿

D.甲公司未能及时通知乙公司不能按时交货，故应向乙公司承担1万元赔偿责任