X、Y均为元素周期表中前20号元素,其简单离子的电子层结构相同,下列说法正确的是

题型:选择题

问题:

X、Y均为元素周期表中前20号元素,其简单离子的电子层结构相同,下列说法正确的是 [ ]

A.由mXa+nYb-,得m+a=n-b

B.X2-的还原性一定大于Y

C.X、Y一定不是同周期元素

D.若X的原子半径大于Y,则气态氢化物的稳定性HmX一定大于HnY

考点:元素周期律元素周期表
题型:选择题

— What do you think of physics?

— I think it’s ______ of all subjects.

A.difficult

B.more difficult

C.most difficult

D.the most difficult

题型:选择题

下面的数组声明语句中正确的是

A.Dim gg[1,5]As String

B.Dim gg[1 To 5,1 To 5]As String

C.Dim gg(1 To 5)As String

D.Dim gg[1:5,1:5]As String

题型:选择题

女性,66岁,反复右上腹部隐痛并反射至右背部5年。口服胆囊造影示:胆囊胆固醇沉积症。手术行胆囊切除。

手术中胆囊肉眼所见可能为()

A.胆囊壁增厚

B.胆囊外观正常

C.胆囊增大

D.胆囊萎缩

E.慢性炎症性改变

题型:选择题

THE QUEEN ANNE HOUSE  The house style that dominated American housing during the 1880s and 1890s was known as Queen Anne, a curious name for an American style. The name was, in fact, a historical accident, originating with fashionable architects in Victorian England who coined it with apparently no reason other than its pleasing sound. The Queen Anne style was loosely based on medieval structures built long before 1702, the beginning year of Queen Anne’s reign.  A distinctive characteristic found in most Queen Anne houses is the unusual roof shape --- a steeply pitched, hipped central portion with protruding lower front and side extensions that end in gables. It is often possible to spot these distinctive roof forms from several blocks away. Another feature of this style is the detailing, shown in the wood shingle siding cut into fanciful decorative patterns of scallops, curves, diamonds, or triangles. Queen Anne houses are almost always asymmetrical. If you draw an imaginary line down the middle of one, you will see how drastically different the right and left sides are, all the way from ground level to roof peak. A final characteristic is the inviting wraparound porch that includes the front door area and then extends around to either the right or left side of the house.  Queen Anne houses faded from fashion early in the twentieth century as the public’s taste shifted toward the more modern Prairie and Craftsman style houses. Today, however, Queen Anne houses are favorite symbols of the past, painstakingly and lovingly restored by old-house buffs and reproduced by builders who give faithful attention to the distinctive shapes and detailing that were first popularized more than one hundred years ago.

Why does the author use the word curious in describing the name of an American style

A.The style was invented before Queen Anne’s reign.

B.The name was accidentally misspelled.

C.The style was more popular in Victorian England.

D.The name did not originate in American.

题型:选择题

要想安排好一次成功的、令外宾满意的跨国会议,首先要做好的工作是()。

A、对外宾进行热烈的迎接

B、筹备好丰盛的宴餐

C、收集有关外宾生活习惯的种种信息,了解不同国家的风土人情和生活禁忌

D、为外宾准备好舒适的房间

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