题型：问答题 A well-dressed(穿得好的) man goes into a restaurant one day. He sits _______at a table near the window.A waiter comes up to him and says,“_____I help you, sir? ” The man says, “Can I see the menu?” “Certainly.” the man wants a good meal. He orders(点餐) a lot of delicious_____ . The waiter brings them to him. The man is having his _____ happily. At this time, a boy comes in and sits down beside the man. He asks the _____ to give him an ice cream. The man does so. Now the boy is eating his ice cream. “I will go out _____ a newspaper.” the man says and leaves. After the boy eats his ice cream up, he _______ and goes to the door.“______, your father has not given the money for the meal and your ice cream.” the waiter stops him and says.“Father? You’re _____. He is not my father. I don’t _____ him. I meet him in the street. He says he will(会) give me an ice cream if I come here at twelve o’clock.” says the boy.小题1:A．inB．onC．downD．up小题2:A．CanB．MustC．ShouldD．Would小题3:A．chickenB．dishesC．saladD．vegetables小题4:A．cakesB．drinkC．supperD．meal小题5:A．manB．fatherC．waiter D．boy小题6:A．withB．forC．toD．at小题7:A．sits downB．gets upC．stands upD．comes down小题8:A．Excuse me B．Sorry C．HelloD．Hi小题9:A．goodB．rightC．wellD．wrong小题10:A．likeB．knowC．helpD．ask 查看答案
题型：问答题 在数列{an}中，a1=1，an+1=2an+n，记bn=an+n+1，n∈N*．（Ⅰ）证明：数列{bn}是等比数列；（Ⅱ）记cn=2n+22bn+3，数列{cn}的前n项和为Sn，求证：Sn＜n+13． 查看答案