题目

(10分)实验室常用的几种气体发生装置如图A、B、C所示：                 A              B            C                          D （1）实验室可以用B或C装置制取氨气，如果用C装置，通常使用的药品是                。 （2）气体的性质是气体收集方法选择的主要依据。下列性质与收集方法无关的是       （填序号，下同。）①密度      ②颜色       ③溶解性        ④热稳定性   下图是某学生设计Columbus College , 241 Queen Elizabeth Drive ,Kowloon CityTo:     All Staff From:  Jakie Mok , Secretary;Sports Development CommitteeDate:   May 20, 2010 A week ago , “Sports for Life” pregramme was sent to the parents, requiring them to select a sport they wanted their child to play. Since then , our staff have received lots of calls from parents asking for more information about it . Here is a memo (备忘录) for your reference when you answer the phones.Sports 1:Basketball. We expect that this will be the most popular of the four sports.Therefore, students should be advised to sign up as soon as possible . Students will take a prevate bus to and from Kwun Tong Sports Park .To cover the cost of hiring a bus ,each student will have to pay ＄10 each time. There will be four basketball courts available for our use with one teacher watching over each game .Sports 2:Gym We will be using St.Peter’s Memorial Park. There are two reasons for choosing theis park. Frist , it is not very busy and crowded before 6:00 pm. Second , it has lot of trees with plenty of shade. Students must bring along two bottles of water to prevent thirst.Three activities, skipping , jogging , outdoor aerobics (有氧运动),all of which are free of charge, will be arranged. And there will be a teacher on duty for each of the activities.Sports 3: Hiking Hiking(远足)will take place at Kowloon Peak.The activitiy will start at 2:30 pm and finish 90 minutes later . Three teachers will accompany the students , and a hiking instructor will accompany each group of 15 hikers . Each instructor will cost ＄75/hr.Sports 4:Swimming The Kowloon City Aqueatic Centre is a 10-minute walk from our school. Four teachers will go to the pool and conduct the goings-on from the poolside . We will only be able to reserve the pool for one hour(i.e. 2:45pm to 3:45pm).Only students skilful at swimming can take up this activity . The pool will have two lifuguards present. Girls must wear a swimming suit.The cost is ＄10 per visit.68.Which of the following is TRUE according to the passage?A.Students selecting basketball had better register early. B.Students participating in gym should arrive at 6:00 pm. C.Hiking usually begins at 2:30 pm and lasts 2 hours. D.Students having swimming suits can take up swimming.69.It can be inferred from the passage that       A.students taking part in basket ball will walk to the courts. B.every student can gain admission to one of the four sports C.hiking students can have a regular rest in the shade of trees D.students taking up the four sports should bring bottles of water70.It can be concluded that           A.each sport will take only on hour B.students will be chaarged for the four sports C.all the sports will take place at Kowloon Peak D.teachers will accompany students on each sport71.The purpose of the memo is to         A.attract students’interest in the programme B.require the parents to select a sport for their chinld C.help the staff explain the programme to the parents D.remind teachers and lifeguards to be present on time