在△ABC中(Ⅰ)若点M在边BC上,且BM=tMC,求证:AM=11+tAB+t

题型:解答题

问题:

在△ABC中
(Ⅰ)若点M在边BC上,且
BM
=t
MC
,求证:
AM
=
1
1+t
AB
+
t
1+t
AC

(Ⅱ)若点P是△ABC内一点,连接BP、CP并延长交AC、AB于D、E两点,使得AD:AC=AE:EB=1:2,若满足
AP
=x
AB
+y
AC
(x,y∈R)
,求x,y的值.
考点:平面向量的应用
题型:解答题

建设工程监理规划编写的依据包括()。

A.政府批准的工程建设文件

B.总监理工程师批准的工程建设文件

C.建设单位的合理要求

D.监理大纲

E.建设工程监理合同文件

题型:解答题

HOUSTON (AP) --- A 10-year-old boy fatally shot his father Friday, striking him several times as he sat in the front seat of a SUV to pick up the boy from his mother's home for a weekend visit.

The incident happened about 3pm on a cul-desac(死胡同)in the 1700 block of Cedar Cove Court, said Sgt. Williams of the Harris County Sheriff's Department.

An investigation found that Rick James Lohstroh, 41, was shot by his son, who was sitting in the back seat of the man's Toyota 4-Runner, said Sgt. Williams. The shooting took place outside the home of Lohstroh's ex-wife, where the boy lives with his mother and a 7-year-old brother.

"We're not certain of anything until we finish our investigation," Williams said. "The information we have at this time is that the 10-year-old did fire the weapon."

The mother and the 7-year-old were inside the house when the shooting occurred, said Williams.

Williams said the gun belonged to the boy's mother. After firing shots through the back seat, the boy exited the back of the vehicle and continued to fire at the car.

The man died on the way to Memorial Herman Hospital.

Lohstroh was a doctor at the University of Texas Medical Branch.

The man and woman shared custody(监护)of the children.

Williams said the mother and the boy were still in the home talking to investigators Friday night.

Neighbors described the family as being quiet and keeping to themselves.

Justin Gray, 17, was walking in the neighborhood when he heard gunshots. "We've had a suicide in this neighborhood once, but never anything like this," Gray said.

小题1:The best title for the news should be __________.

A. A Boy Shot His Father

B. Shooting Kill a Father

C. An Unbelievable Tragedy

A Ten-Year-Old Boy's Cruelty

小题2: Which of the following statements is TRUE according to the news?

A.The father is not responsible for the boy.

B.The family don't like being linked to their neighbors.

C.The boy lives with Rick James Lohstroh.

D.The boy has no brother or sister.小题3:What can we infer from the text?

A.The tragedy happened because the boy had seen too many films showing violence.

B.The boy killed his father because he hated it that he deserted his mother.

C.Such things often occurred in this neighbourhood.

D.The boy's parents got divorced(="separated)."小题4:The reason why the boy shot his father __________.

A.is clear

B.can't be made out

C.is unknown

D.is quite simple小题5:The underlined word "suicide" most probably means __________.

A.the act of killing the lives of a whole family

B.an instance of deliberately killing oneself

C.the situation of getting on smoothly with others

D.the peaceful surroundings

题型:解答题

若正时齿形带到了规定的更换周期,经检查正时齿形带使用状况良好,对是否更换正时带的说法为()

A.没有必要更换

B.必须更换

C.没有统一规定

题型:解答题

对肺泡气分压变化起缓冲作用的肺容量是

A.余气量

B.补吸气量

C.补呼气量

D.深吸气量

E.机能余气量

题型:解答题

脾胃被中医称作()。

A.先天之本

B.君主之官

C.后天之本

D.华盖之脏

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