如图所示在离地面上空高h处质点A做自由落体,与此同时在A正下方的地面上有质点B以

题型:问答题

问题:

如图所示在离地面上空高h处质点A做自由落体,与此同时在A正下方的地面上有质点B以初速度竖直上抛.若B在上升阶段能与A相遇,求出的取值范围;若B在下降阶段与A相遇,求出的取值范围.

考点:s-t图像
题型:问答题

中国证券业协会自1991年成立以来,共召开了()次会员大会。

A.4

B.6

C.8

D.10

题型:问答题

在校验1151AP绝对压力变送器时,若仪表的测量范围位50--150KPa,当时的大气压位100KPa,则在通上电源时,仪表的输出为()。

A.4mA

B.8mA

C.12mA

D.10mA

题型:问答题

信息匹配。

首先请阅读以下花语:

     A.Red Roses

     Red roses, as we think of them today, are the traditional symbol for love and romance and a

time-honored way to say "I love you." The red rose has long symbolized beauty and perfection, so a

bouquet of red roses is the perfect way to express your deep feelings for someone special. For the

budding relationship, a red rose bouquet can also signal the beginning of romantic intentions. They can

send a message of commitment and an invitation to take the next step.

     B.Carnations (康乃馨)

     The meanings of carnations include fascination, distinction, and love. Like many other flowers,

different messages can also be expressed with the flower's different color varieties. Light red carnations,

for example, are often used to convey admiration, whereas pink carnations are often given as a sign of

gratitude. Today carnations are worn and gifted worldwide on Mothers Day and have become symbolic

of purity, strength and endurance of motherhood.As a custom pink carnations are worn to honor living

mothers and white carnations for the deceased mothers.

     C.Chrysanthemums(菊花)

     Chrysanthemums were cultivated in China as a flowering herb as far back as the 15th century BC.

It was named from the Greek prefix chrys-, which means golden (the color of the original flowers),

and -anthemion, meaning flower. Chrysanthemums can be yellow, white or even bright red. Many flower

forms are available, spoon-shaped, threadlike or spiderlike. With its special meaning "Rest" associated

with them, chrysanthemums are one of the traditional funeral flowers which you can even convey your

sincere feelings for the dead.

     D.Sunflowers

     Sunflowers turn their heads towards the sun and this is how they got their common name. They

originated in Central and South America. Sunflowers are not only pretty to look at but sunflower seeds

are power-packed with healthy fats, protein, fiber, minerals, and vitamin E - all important to the nutritional quality of your diet.

     E.Purple hyacinth (风信子)

     The language of flowers can be found as far back as the 14th century. Every flower has a special.

Purple hyacinths are a meaningful gift, perfect for expressing feelings for a friend to convey the feelings

like "You are a wonderful friend and I wish you peace, prosperity and happiness" or "I am sorry. Please

forgive me."

     F.Forget - me - not

     The little blue Forget Me Not flower, though quite small in size, expresses sweet memories of true and

faithful love, a soft cry - "Do not forget" the sunny and cloudy days of a deep relationship. Medicinally,

this plant has a strong affinity for the respiratory organs, especially the let lower lung. In some countries, it

is sometimes made into syrup and given for lung affections.

再阅读以下顾客信息,然后匹配顾客与适合他们的鲜花.

     1.David has just heard that one of his friends he knows has lost a favorite relative and he knows that his friend really needs to be concerned at this moment. So he calls the flower shop for flower delivery as a way to show his friendship and support during this difficult time.

     2.Mary has not met her mother since she moved to Paris after the graduation from Cambridge

University. When Mothers' Day is coming this year, she wants to send something special to help her

express respect and thankfulness for the virtues of motherhood.

     3.True love's difficult to find, but Catherine is fortunate enough to have found it, so she intends to

give her beloved a gift on the Anniversary Day, which his regarded as an emblem of loving remembrance,

faithful love, constancy and undying hope.

     4.Tony met Gloria at his friend's graduation party last weekend, and fell into love with her at the first

sight. He is planning to ask her for the first official date, expecting Gloria to receive them with a sparkle in

her eyes.

     5.Hebe has really got a reason to send flowers to her friend Carrie who was deeply hurt by her

careless mistake. What she needs to do is make an apology, showing how regretful she is. For this special occasion, she is wondering what flowers will be appropriate to send.

题型:问答题

气管、支气管异物的初步诊断主要依据是()。

A.支气管肺炎

B.X线拍片检查

C.病史

D.肺气肿

E.肺不张

题型:问答题

简要病史:50多岁突发右第一跖趾关节肿痛8h。

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