第7题: [单项选择]排成一排的13个皮包的平均价格为130元。前8个皮包的平均价格为140元，后8个皮包的平均价格为90元，问中间3个皮包的平均价格是多少元( ) A. 120 B. 100 C. 80 D. 50 参考答案:D 答案解析:[命题提示]
本题考查平均值的计算
[解题要点]
找准中间3个皮包，求出其总价
[答案与解析]
13个皮包一字排开，可分为5+3+5三部分，由题意知前8个皮包总价+后8个皮包总价-
第9题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. In a bookstore. B. At the camera shop. C. In a hospital. D. At a jewelry store. 参考答案:B 答案解析:[听力原文]
W: We have a wide selection of color films. What exactly do you have in mind
M: I would li
第22题:[单选题]Traffic reaches its rush hour between 8:00 and 9:00 in the morning. A.border
B.goal
C.level
D.peak 参考答案:D 题干意为“早八点至九点是上下班交通高峰期。” 句中划线词组为名词词组，意为“上下班高峰”。D项peak意为“高峰”，例句：In order to get out of the peak -hour traffic, we must start early．我们得早点儿动身来避开交通高峰期。 A项意为“边界”。B项意为“目标”。C项意为“水平，级别”。故选D。
