题目

根据下图实验装置，请回答: (1)仪器a的名称是__________。 (2)检查装置A气密性的方法是夹紧止水夹，__________，则气密性良好。 (3)用H2O2制取氧气，选择的发生装置为______(填字母)，反应的化学方程式为__________。 (4)用装置F和另一仪器(除导管外)收集并测量O2体积，另一仪器名称为_____，在F中气体应从导管_______(填“b”或“c”)端通入。 (5)实验室里，常用加热无水醋酸钠和碱石灰固体混合物的方法，制备甲烷。 ①选择的发生装置为______(填字母)。用装置E收 阅读理解 　　It was a very different school from those in China．You're not met by imposing doors and concrete walls, and the buildings were inviting．On the front of the main building was inscribed “Lee Elementary School, 1904．” Wow! I knew it was an old school．Surrounding the main building were five trailers(拖车式活动房屋)．One of them was my classroom, 5T．The “T” stood for Mrs．Toalson, my 5th grade teacher． 　　Mrs Toalson showed me to my seat．A girl sitting at my table greeted me．Her name was Regina, and she was a blonde girl from Ukraine．Her eyes were like diamonds, and we had met at a party two days before． 　　During my first morning, we had math class, PE and science．We didn’t even have a break! I wondered why? Mrs Toalson said to us：“Guys, line up for the bathroom break please!” All the kids stood up and went outside． 　　I didn’t know what “bathroom break” meant．Was it break time? Lunch time? I was confused．Nevertheless, we followed Mrs．Toalson to the main building．We sat in the hallway across from the bathroom．In Chinese, “bathroom” means the WC, and a “break” means having a rest! Gosh, I thought that was weird and why did we have to go to the bathroom together? 　　“Mary and Regina, you may go．” When we heard Mrs．Toalson, we went into the bathroom．The bathroom was clean, and it smelled like perfume．I asked Regina what if someone wanted to go to the bathroom during class time．She told me that there was a special pass called a “bathroom pass．” All you had to do was raise your hand with the pass to let Mrs．Toalson know you need to go to the bathroom．Then you would be permitted to go． 　　At 3：30pm, school ended for the day．Students put their textbooks in their cabinets and lined up in front of the change room, where they collected their backpacks and coats．As they walked out of the door, each student said “Good bye” and gave Mrs．Toalson a high five． 　　“Did you have a good day today?” Mrs．Toalson asked me as she hugged me goodbye． 　　“Sure!” I nodded． (1) Which is the main difference between the author’s new school and the schools in China? [　　] A． There are no imposing doors and concrete walls in her new school． B． The author’s old classroom is a trailer． C． The author’s new school is an old one with one-hundred –year history． D． The buildings in her new school are very inviting． (2) The underlined phrase “bathroom break” probably means ________． [　　] A． the time for taking shower B． the time for going to WC and having a rest C． the class interval for washing D． the class break for having a bath (3) What does the author think of the first day in her new school? [　　] A． Disappointing． B． Satisfying． C． Admiring． D． Doubtful． (4) According to the passage, the author wanted to know the answer to the following questions EXCEPT ________． [　　] A． what did “bathroom break” mean? B． why didn’t we have a break between lessons? C． why did we have to go the bathroom together? D． why did we have lunch together? (5) In the author’s new school, if a student wants to go to WC during the lesson, what does he or she have to do? [　　] A． To raise his/her hand to let his/her teacher know． B． To stand up and ask for his/her teacher’s permission． C． To raise his/her hand with “bathroom pass” and ask his/her teacher’s permission． D． To wait until the class is over．