题目

—个盒子里装有相同大小的红球、白球共个,其中白球个.从中任取两个,则概率为的事件是(   ). A.没有白球                        B.至少有一个白球 C.至少有一个红球                     D.至多有一个白球 答案：B 解析：为只有一个白球的概率, 为有两个白球的概率,故选B.阅读理解。     We spent the next three days based in Paihia, in the famousBay of Islands.  Although Paihia is only a town,  it is a good basefor exploring the northern part of the Northland.  We spent one dayin nearby Waitangi,  visiting the site (地点) of the first Europeansettlements and signing of the Treaty of Waitangi, which createdNew Zealand as it is today.      On the site, there is a fantastic museum which explains thehistory of the country, as well as the relationship between theEuropean settlers and the native Maori tribes. There is also anexcellent example of a Maori waka, or carved canoe, in which theoriginal Maori tribes arrived in Aotearoa, or the Land of the LongWhite Cloud.      It was a great introduction to New Zealand history and cultureand would give us a good basis for understanding the Maori culturethat we would meet with as we traveled through the country.    The weather wasn't fit to sailing through the blue, island-dotted bay, so the next day we headed across the point to theKauri Coast and the Waipoa Kauri Forest to see the high Kauritrees, one of the few places in the country where these big treesthat once covered the island still exist. Standing hundreds of feethigh, with girths that would take 20 men to circle, theseprehistoric(史前的) trees were used for everything from wakas tohomes. Most were cut down, and only a few still survive. Thetrees in the forest are over 1 000 years old, and walking along thepaths deep into the bush to see them was like walking through landwhere dinosaurs once walked.      On the way back, we stopped in several small villages andtowns, each of which seemed more Shire-like. We had almostforgotten that this was Lord of The Rings land, but in the rollinggreen hills of the central northland, we remembered that BilboBaggins and company could have lived here, too.1. Which may tell the main idea of the passage?  A. A fantastic museum.B. Our trip to New Zealand.C. The Kauri trees of New Zealand.D. Our trip to the Bay of Islands.2. _____ has made New Zealand today.A. The Waitangi peopleB. European settlementsC. The local peopleD. The signing of the Treaty of Waitangi3. The second and third paragraphs mainly talk about ____. A. a museum                      B. Maori WakaC. the Maori culture               D. New Zealand history4. How did the author understand the Maori culture? A. By reading a book about New Zealand culture.B. By experiencing the Maori life.C. By visiting the local villages.D. By being introduced.5. According to the passage,  the underlined word " girths" in  Paragraph 4 probably refers to ____.   A. the height of the tree         B. the length around the treeC. the width of the tree         D. the length across the tree