某溶液中,由水电离产生的[H+]=1×10-11mol/L,则该溶液的pH可能为

题型:选择题

问题:

某溶液中,由水电离产生的[H+]=1×10-11mol/L,则该溶液的pH可能为

A.11

B.3

C.8

D.7

考点:燃烧热水的离子积常数水电离的影响因素水的电离平衡
题型:选择题

颅内转移瘤多分布于哪个血管供血区

A.大脑前动脉

B.大脑中动脉

C.大脑后动脉

D.基底动脉

E.颈外动脉

题型:选择题

治疗石淋宜选用()。

A.八正散

B.石苇散

C.补中益气汤

D.程氏萆解分清饮

E.无比山药丸

题型:选择题

竞争性谈判方式的内容主要包括:①成立谈判小组;②确定成交供应商;③谈判;④确定邀请参加谈判的供应商名单;⑤制定谈判文件;⑥将成交结果通知所有参加谈判的供应商;⑦向成交供应商发出成交通知书。下列选项中,按谈判方式的程序排列正确的是( )。

A.①②④③⑤⑥⑦

B.①⑤④③②⑥⑦

C.①②④③⑤⑥⑦

D.①⑤③④②⑥⑦

题型:选择题

My grandfather grew up in war-torn Europe. When German soldiers occupied his hometown ,the thriving city of Tarow, Poland, he refused to obey them and eventually joined the Soviet army to fight for his country’s freedom . “Stand straight, stand tall,” he told himself.

After the war, in 1947, he boarded a boat for Manhattan. He was hungry and suffering from seasickness. All alone in a new country, he was frightened about his future .Still, he marched head-on into the hustle and bustle of the streets of New York . Soon he met other European immigrants, each of them trying to find his or her own way .If they could do it, why couldn’t he? “Stand straight, stand tall,” he would remind himself.

Thanks to the help of a loyal and trusting friend, my grandfather gained a jewelry booth on Canal Street, New York City .He once told me how nervous he was on that first day of work. He was not only trying to learn this tough new business, but also a new language.

To his surprise, the men in neighboring booths—who could have taken advantage of him—offered their help and advice. Within months, my grandfather was commanding his spot behind the counter, selling diamonds and cultured pearls as if he’d been doing it his whole life.

Stand straight and stand tall.

In later years, my grandfather would take both my mother and her sister down the aisle at their weddings. As he stood with each of them, he thought about their new beginnings, and of the adventures and journeys they would experience together .He also thought about the children who would one day carry on his family name.

I am so proud to be one of those children. Listening to my grandfather’s remarkable experiences has changed the way I view my own life.

56.Which is the correct order of the things that happened in the passage?

a. My grandfather took both my mother and her sister down the aisle at their weddings.

b. World War II broke out in Europe.

c. My grandfather went to America.

d. My grandfather began to run his diamond business.

e. The men in neighboring booths helped him.

A.b, c, a ,d, e          B.b, c,d ,e ,a           C.b, c ,e , a ,d        D.c, b ,e ,d ,a

57.Which is NOT true according to the passage?

A.My grandfather was a soldier during World War II.

B.My grandfather went to America by sea.

C.My grandfather had been doing a jewelry business his whole life.

D.My grandfather ran his business successfully.

58.Grandpa probably inspired his grandchildren in time of trouble by saying “    ”.

A.A friend in need is a friend indeed

B.God help those who help themselves

C.Stand straight ,stand tall

D.Practice makes perfect

59.It can be concluded that    .

A.Grandpa never lost heart in time of hardships

B.Grandpa never threw doubt upon his fate

C.Grandpa was born to be a businessman

D.Grandpa didn’t live up to his friend’s expectations

题型:选择题

管路系统的特性曲线是随着()的增加而上升。

A、流量

B、扬程

C、轴功率

D、效率

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