题干

秦九韶算法是中国南宋时期的数学家秦九韶提出的一种多项式简化算法,对于求一个n次多项式函数fn(x)=anxn+an﹣1xn﹣1+…+a1x+a0的具体函数值,运用常规方法计算出结果最多需要n次加法和
n
(
n
+
1
)
2
乘法,而运用秦九韶算法由内而外逐层计算一次多项式的值的算法至多需要n次加法和n次乘法.对于计算机来说,做一次乘法运算所用的时间比做一次加法运算要长得多,所以此算法极大地缩短了CPU运算时间,因此即使在今天该算法仍具有重要意义.运用秦九韶算法计算f(x)=0.5x6+4x5﹣x4+3x3﹣5x当x=3时的值时,最先计算的是(    )

A:﹣5×3=﹣15

B:0.5×3+4=5.5

C:3×33﹣5×3=66

D:0.5×36+4×35=1336.6

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答案(点此获取答案解析)

B

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根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Doctors say anger can be an extremely damaging emotion, unless you learn how to deal with it. They warn that anger can lead to heart disease, stomach problems, headaches, emotional problems and possibly cancer.

    ____ Some people express anger openly in a calm reasonable way. Others burst with anger, and scream and yell. But other people keep their anger inside. They can not or will not express it. This is called repressing anger.

    For years many doctors thought that repressing anger was more dangerous to a person's health than expressing it. They said that when a person is angry, the brain releases the same hormones (荷尔蒙). They speed the heart rate, raise blood pressure, or sugar into the blood, etc.____

    Some doctors say that both repressing and expressing anger can be dangerous. They believe that those who express anger violently may be more likely to develop heart disease, and they believe that those who keep anger inside may face a greater danger of high blood pressure.

    ____ They say the first step is to admit that you are angry and to recognize the real cause of the anger, then decide if the cause is serious enough to get angry about. If it is, they say, “____ Wait until your anger has cooled down and you are able to express yourself calmly and reasonably.”

    Doctors say that a good way to deal with anger is to find humor in the situation that has made you angry. ____

A. In general the person feels excited and ready to act.

B. They said that laughter is much healthier than anger.

C. Expressing anger violently is more harmful than repressing it.

D. Anger may cause you a cancer.

E. Do not express your anger while angry.

F. Anger is a normal emotion that we all feel from time to time.

G. Doctors say the solution is learning how to deal with anger.