题目

当太阳直射北回归线时，下列说法正确的是（       ） A.赤道上昼夜平分                      B.北半球各地昼长达到最大值 C.南半球各地正午太阳高度达到最大值    D.南极圈内出现极昼现象 答案：B根据对话意思和所给首字母，写出完整正确的单词。 Susan: Where are you going, David? David: To Beijing?Susan: It's a long trip from here by bike. How long will it take you to (1)c_________it? David: About two years. Susan: How many (2)o                 you are making the trip? David: Five. Susan: (3)W_________are you making it?David: We are trying to collec some money. Susan: What will the money be used for?David: To a charity (4)c__________ Protecting the Red-Crowned Crane.Susan: That sounds great. Good (5) l__________ with your trip. David: Thanks.