日、月和行星的周日视运动的轨迹严格地讲应是()。A.周日平行圈 B.赤纬圈 C.连续

题型:单项选择题

问题:

日、月和行星的周日视运动的轨迹严格地讲应是()。

A.周日平行圈

B.赤纬圈

C.连续的球面螺旋线

D.高度平行圈

考点:海船船员考试天体视运动天体视运动题库
题型:单项选择题

Do you know Eskimos? Let me tell you something about their lives.

Eskimos live near the North Pole(北极).There are only two seasons there, winter and summer.

There is no spring or autumn there. The winter nights are long. You can’t see the sun for more than two months, even at midday. The summer days are long. For more than two months, the sun never goes down and there’s no night.

Eskimos have warm clothes. They make their clothes from the skins of animals. From skins(皮毛) they make coats, caps and shoes.

Near the North Pole trees can’t grow, for it is too cold there. The Eskimos have to make their houses from skins, snow or stone. When they got out in storms and can’t get back home, they make houses of snow. They leave these houses when the storm is over.

Life is hard for the Eskimos, but they still like to live there.

小题1:Near the North Pole there are _______ in a year.

A.two seasons—winter and summer

B.two seasons – spring and autumn

C.four seasons

D.two seasons sometimes and four seasons sometimes小题2: How long does the longest day or night last(持续) near the North Pole?

A.24 hours

B.Over a week

C.A month

D.Over two months小题3:Eskimos use skins to make________.

A.clothes

B.houses

C.trees

D.both A and B小题4:There are no ______ near the North Pole.

A.days

B.nights

C.trees

D.animals小题5: Eskimos make houses of snow to protect(保护) themselves from______.

A.animals

B.storms

C.snow

D.rain

题型:单项选择题

为了迎接“国庆”,学校用彩灯装饰校门,按红、黄、蓝、绿顺序挂灯,那么第17盏灯和第30盏灯分别是什么颜色?

题型:单项选择题

男性,57岁。3个月来腹胀、水肿,1周来加重伴腹痛。20年前曾发现HBsAg(+)。查体:可见肝掌及蜘蛛痣。蛙状腹,肝未及,脾肋下4cm,全腹压痛,无明显反跳痛,移动性浊音阳性。化验:血白蛋白24g/L,血球蛋白31g/L,血钾3.8mmol/L,血钠136mmol/L,血氯98mmol/L。

该患者最必要的检查是()。

A.腹水常规及细菌培养

B.尿常规及尿钠检测

C.腹部B超检查

D.腹部CT检查

E.胃镜检查

题型:单项选择题

定基价格指数是评估时点的价格指数与资产购建时点的价格指数之比。 ( )

题型:单项选择题

已知车床小滑板丝杠螺距为4mm,刻度分100格,车削轴向齿距为px=6.2832mm的双头蜗杆,如果用小滑板刻度分头时,求小滑板应转过的格数。

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