直肠癌一般先向肠管周围及向肠壁深层浸润生长,向肠壁纵轴浸润发生较晚,浸润距离一般不超

题型:单项选择题 A1/A2型题

问题:

直肠癌一般先向肠管周围及向肠壁深层浸润生长,向肠壁纵轴浸润发生较晚,浸润距离一般不超过癌肿边缘的()

A.1~2cm

B.2~3cm

C.4~5cm

D.5~6cm

E.6cm以上

考点:烧伤外科学(医学高级)烧伤外科综合练习烧伤外科综合练习题库
题型:单项选择题 A1/A2型题

图甲是探究磁场对电流的作用的实验电路,开关闭合后,线圈_______转动(选填“能”或“不能”),但_______连续转动(选填“能”或“不能”),为了解决这一问题,小轩同学利用漆包线绕制的多匝线圈设计了图乙的实验装置,小轩在将线圈两端的绝缘漆刮去时注意到,轴的一端漆皮要_______,另一端漆皮只刮去_______.

①开关闭合后线圈转动,改变线圈转动方向的措施是:_______或_______.

②利用磁场对电流的作用来工作的设备是:_______

A.电铃                  

B.电磁起重机

C.动圈式扬声器

D.动圈式话筒.

题型:单项选择题 A1/A2型题
在△ABC中,a,b,c分别是角A,B,C的对边,a=
6
,b=2,且1+2cos(B+C)=0,则△ABC的BC边上的高等于(  )
A.
2
B.
6
2
C.
6
+
2
2
D.
3
+1
2
题型:单项选择题 A1/A2型题

Botswana lies immediately to the north of South Africa. It is bordered on the north and west by Namibia, on the north and east by Zimbabwe, and is connected by a narrow strip of land on the northern border to Zambia. Its territory consists almost entirely of a broad, flat, arid subtropical plateau(高原), though there are hills in the eastern part of the country.

In the northwest, the Okavango River empties into the Kalahari sands, creating the largest inland river delta in the world. While the Okavango Delta is home to relatively few large animals in comparison to other areas of Botswana, its clear waters and countless small islands are home to a variety of birds, plants, and smaller species of animals.

Nearby is Chobe National Park, a beautiful grassland reserve(保护区) that has gained international fame for its large elephant population. Southeast of Chobe are Botswana's large Makgadikgadi salt pans, home to numbers of blue wildebeest, several antelope species, and those international lovers of salt pans, flamingos(a kind of birds).

Almost the entire remaining portion of the country is covered by the Kalahari Desert--a varied environment of sand and grassland. Although this area of Botswana is where few people live, it is one of the richest wildlife areas in all of Africa.

Botswana's two largest parks, the Central Kalahari Game reserve and Gemsbok National Park, are found in this region.

Botswana's climate can get rather cool, particularly during the dry winter months of June to August when night occasionally brings frost. The rainy summer months (December through March) are best avoided for those interested in enjoying the best game viewing conditions.

72.South Africa is to the______of Botswana.

A.east     B.north   C.south   D.west

73.In the Okavango Delta we can find______.

A.a lot of large animals         B.many small islands

C.salt pans             D.polluted waters

74.If we want to see flamingo, we should go to_______ .

A.salt pans             B.Chobe National Park

C.Kalahari Desert          D.Gemsbok National Park

75.It is suggested that tourists visit Botswana in______.

A.December   B.March  C.January       D.July

76.What is the passage mainly about Botswana?

A.Location, geography and climate.     B.Living conditions, politics and salt pans.

C.Parks, animals and population.  D.Animals, races and sightseeing places.

题型:单项选择题 A1/A2型题

城镇个体工商户参加基本养老保险,缴费基数可在当地上年度职工平均工资的()%范围内确定。

A.50-150

B.50-200

C.60-200

D.60-300

题型:单项选择题 A1/A2型题

产前检查应从下列哪一时间开始最好

A.妊娠6周

B.妊娠8周

C.确诊早孕时

D.妊娠12周

E.妊娠20周

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