[单项选择]要充分发挥建设工程数据库对合理确定拟建工程目标的作用，关键在于客观分析拟建工程的( )。
A. 投资主体
B. 技术要求
C. 具体条件
D. 特点和具体条件

Everyone needs to sleep. If we don’t sleep enough, we often feel tired and irritable (易怒的).It seems there are two purposes of sleep: physical rest and emotional rest. We need to rest our bodies and our minds. Both are important in order for us to be healthy.
Each night we alternate (交替) between two kinds of sleep: active sleep and passive sleep. The passive sleep gives our body the rest that is needed, and prepares us for active sleep, in which dreaming occurs. In passive sleep, the body is at rest. The heart slows down. The body processes become very slow. We move very little. And the brain becomes very inactive. If a person continues to sleep, she or he enters a new stage, a more active stage. The body goes thro, gh several changes: the brain temperature rises, the amount of blood in brain increases, the body becomes very still and the brain becomes active. And as the brain becomes more active, the eyes begin to move rapidly, and the person is dreaming.
Th
A. the brain is active
B. the heart beats faster than usual
C. the body is still
D. the body temperature rises

If you live or plan to travel where Lyme disease is a problem, there are important facts you should know. For example, you can get bitten by the tick ( 扁虱) that carries the disease while out gardening, walking, even playing with your dog. And, if you don’t have any early symptoms, you might not know you have Lyme disease. You could be one of the few people who develop serious health problems. Left untreated, Lyme disease can lead to potentially serious joint and neurological (神经病的) conditions. Why put yourself or your family at risk
Now, there’s a vaccine (疫苗) that has been shown to be safe and effective in preventing Lyme disease. It’s called LYMErix. New LYMErix for people 15 to 70. As with any vaccine, LYMErix may not protect 100% of individuals. LYMErix may be associated with local reactions including redness and swelling, flu-like symptoms.
Ask your doctor about new LYMErix, or call toll free 1-888-LYMERIX, ext 200 for information.
N
A. death
B. joint and neurological conditions
C. redness
D. swelling