下列选项中，能正确表示蜜蜂的变态发育过程的是（ ） A．幼虫→成虫→受精卵 B．

Marco Polo(马可波罗) was born in Venice in 1254. He was the most famous foreigner to visit Asia（亚洲）during the Middle Ages. He wrote a book about his travels. In his book he wrote all the things he saw and heard. Many people in the west read the book, but few believed what Marco Polo said in the book. He told stories about a lot of strange people and places. But at that time nobody knew these places and the people.

When Marco Polo was still very young, he decided to travel together with his father. It took them more than three years to travel to China, later he became a friend of the Chinese emperor (皇帝) . He learned to speak Chinese when he traveled around, and he talked to many people in Chinese. The emperor liked him and made him a Chinese Official(官员). At that time Marco Polo was only thirty years old. After nearly seventeen years’ travel in the east, Marco and his father wanted to go back home.

When Marco and his father arrived in Venice many years later, their family and friends saw them again. They couldn’t believe their eyes because Marco and his farther were quite old. Marco Polo and his father had been away for almost 25 years.

小题1:Marco Polo was                             foreigner           the Middle Ages.

小题2:Marco Polo wrote a famous book ___________ “The Travels of Marco Polo”. He wrote __________           _ he saw and heard in the book.

小题3:Many people in the west read the book, but ____  _____ believed ________    ____.

小题4:It took Marco Polo and                  over three years to ________  __________.

小题5:Marco Polo and his father had been away ____                            .

车体落成后，KZW-4型空重车自动调整装置横跨梁垫板与横跨梁托调整垫板的间隙不大于（）。

A、0mm

B、0.2mm

C、0.5mm

D、1mm

社会主义社会中，人与人之间的关系是()

A、竞争

B、合作

C、平等

D、互助

复发性阿弗它溃疡在口腔粘膜的少发部位是（）

A.唇

B.颊

C.舌尖、舌缘、舌腹

D.牙龈、硬腭

E.前庭沟

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