[单项选择]27.When a stroke occurs,the arteries leading to ______and within the brain. 　　28.A person’s vision is likely to be affected if a stroke______. 　　29.Some people can reduce their risk of stroke if they______. 　　30.New treatments are now available to people who______. 　　A.suffer from a stroke 　　B.will be affected 　　C.change their lifestyles 　　D.will take place 　　E.occurs at the back of his/her brain 　　F.controls various body functions

[单项选择]27.When a stroke occurs,the arteries leading to and within the brain. 　　28.A person’s vision is likely to be affected if a stroke. 　　29.Some people can reduce their risk of stroke if they. 　　30.New treatments are now available to people who. 　　A　suffer from a stroke 　　B　will be affected 　　C　change their lifestyles 　　D　will take place 　　E　occurs at the back of his/her brain 　　F　controls various body functions

[单项选择]27.When a stroke occurs,the arteries leading to ______and within the brain. 　　28.A person’s vision is likely to be affected if a stroke______. 　　29.Some people can reduce their risk of stroke if they______. 　　30.New treatments are now available to people who______. 　　A.suffer from a stroke 　　B.will be affected 　　C.change their lifestyles 　　D.will take place 　　E.occurs at the back of his/her brain 　　F.controls various body functions

[简答题]arteries of communication

[简答题]高科技泳池short stroke

[判断题]

Inflation occurs when government sectors intervene the capitalist economic system.

[填空题]Microbubbles should help stroke patients by dealing with ______.

[简答题]Sometimes annihilation occurs as an unintended result of new contact between two groups.

[简答题]Direct lending risk occurs in products ranging from loans and overdrafts to credit cards and residential mortgages. It exists for the entire life of the transaction.

[填空题]HIV infection frequently occurs in a household setting.

[简答题]

Radiation occurs from three natural sources: radioactive material in the environment, such as in soil, rock, or building materials; cosmic rays; and substances in the human body, such as radioactive potassium in bone and radioactive carbon in tissues. These natural sources account for an exposure of about 100 millirems a year for the average American.
The largest single source of man-made radiation in medical x-rays, yet most scientists agree that hazards from this source are not as great as those from weapons test fallout, since strontium-90 and carbon-14 become incorporated into the body, hence delivering radiation for an entire lifetime. (46)The issue is, however, by no means uncontroversial; indeed, the last two decades have witnessed intensified examination and dispute about the effects of low-level radiation.
A survey conducted in Britain confirmed that an abnormally high percentage of patients suffering from arthritis of the spine who had been treate