对于任意向量a、b,定义新运算“※”:a※b=|a|•|b|•sinθ(其中θ为

题型:填空题

问题:

对于任意向量
a
b
,定义新运算“※”:
a
b
=|
a
|•|
b
|•sinθ
(其中 θ为
a
b
所的角).利用这个新知识解决:若|
a
|=1 |
b
|=5
,且
a
b
=4
,则
a
b
=______.
考点:向量数量积的运算
题型:填空题

开行旅游列车,在折返站停留超过(),自超过时起,按时核收停留费。

A.12h

B.24h

C.48h

D.72h

题型:填空题

肾炎性肾病不同于单纯性肾病的是

A.血浆蛋白降低

B.血尿、高血压

C.水肿明显

D.大量蛋白尿

E.胆固醇增高

题型:填空题

Winston Churchill was born into a famous family.His father was a successful politician.However, as a boy, Churchill was considered a slow learner in school.Later he entered the Army and saw action in various countries.

In October 1900, Churchill began his political career.For the next sixty years Churchill’s work as a great politician was both brighter and more difficult than his father’s had been.In 1939 German attacked Poland.Churchill prepared to fight.In 1940 he became the Prime Minister of English.

France fell.The Germans fought their way through Western Europe.It looked as if Britain was about to lose the war.Was it now possible to ask for peace, and listen to Hitler?

Churchill spoke: “I have nothing to offer but blood, hard work , tears and sweat… You ask what is our policy? I will tell you, it is to fight, by sea , by land and air, with all our force and with all the strength that God can give us.You ask what is our aim? I can answer in one word: Victory.”

The Germans began moving their armies to the French coast and prepared to go to war with British.The British had not enough guns to go around.Churchill gave the answer: “ We shall defend our island, whatever the cost may be.We shall fight on the coast ; we shall fight on the landing grounds; we shall fight in the fields and in the streets; we shall fight in the hills; we shall never give up.”

By his courage and hard work, Churchill heartened his people and other nations fighting together against Hitler.Victory finally came when the Germans lost World War II.

Churchill died in 1965 and was given a state funeral.This was a fitting payment to one of all the greatest men the world had ever seen.

小题1:Churchill ______ before he became a politician.

A.was a slow student

B.was an army man

C.helped his father in his career

D.had little interest in politics小题2:The Germans attacked British _______.

A.after France was defeated

B.before France fell

C.soon after Poland was attacked

D.before Churchill became the Prime Minister小题3:The underlined word “heartened” probably means ______ in this passage.

A.surprised

B.encouraged

C.asked for

D.called for小题4:Which of the following is NOT true?

A.Churchill had worked as a politician for more than sixty years.

B.The writer admired and respected Churchill very much.

C.Churchill was not so clever as his father.

D.Churchill was one of the most inspiring, brave and wise leaders in the British history.

题型:填空题

人工垂直接地体的长度宜为()。其间距不宜小于其长度的()倍。

题型:填空题

四个球队进行循环赛,其比赛结果可以表示成一个()。

A.有向图

B.无向图

C.树

D.不连通图

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