同侧偏盲伴黄斑回避常见于A．视束病变 B．视交叉处损害 C．视 * * 水肿 D．颈内动脉

我国社会主义医德原则确立的时间是（）

A.1949年

B.1956年

C.1981年

D.1991年

妊娠20周末：

A．Chadwick征
B．蒙氏结节
C．Hegarsign
D．Braxton　Hicks收缩
E．乳腺增生

如图，利用小角法测定观测点P与基准线AB间的水准位移△，已知P点距A点的距离S为40m，测角中误差为±5"，在不考虑距离测量中误差影响的情况下，△的测定精度为（）mm。（提示：△=α.S/p，此处p取200000）图略

A.±0.5

B.±1.0

C.±1.5

D.±2.0

When Christopher Columbus landed on the then unnamed Costa Rica in 1502, he saw many Indians wearing gold earrings. So he thought the land must be rich in gold. He named the place Costa Rica, which means “rich coast” in Spanish.

Though little gold was found, Costa Rica today is indeed rich with coffee and bananas. Coffee is the most important product in Costa Rica and most of it is exported (出口) to other countries like America and Germany. Bananas are the country’s second most important export.

Costa Ricans also grow many other crops such as fruits, corn and beans for their own use. Costa Ricans love colors and their houses are painted in bright colors.

Education is very important to the Costa Ricans. Almost every village has a school and education is a must for children between seven and fourteen years of age. Boys and girls go to separate (单独的) schools. Classes begin in March and end in November. The other three months of the year are harvest time and the children have to help their parents to pick coffee beans.

小题1:    What’s the main idea of the first paragraph?

A．How Columbus found Costa Rica.

B．How Costa Rica got its name.

C．What the Costa Ricans wore.

D．What language the Costa Ricans spoke.小题2:    The Costa Ricans may NOT paint their houses ______.

A．pink and red

B．grey and black

C．blue and green

D．yellow and orange小题3:    In Costa Rica, boys and girls between seven and fourteen ______.

A．must go to school

B．study in the same school

C．do not have to go to school at all

D．can choose to stop schooling at any time小题4:    From December to February, school children in Costa Rica ______.

A．have lessons every day

B．have their examinations

C．help their parents pick coffee beans

D．help their parents decorate their houses小题5:    This passage is mainly about ______.

A．Christopher Columbus

B．Costa Rica

C．some products from Costa Rica

D．the education of Costa Rica

下列程序的运行结果是（）A=1B=2DO WHILE A<=7B=B*4-AIF B>24？BENDIFA=A+3ENDDO

A.7

B.24

C.89

D.5