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—______ any students in the classroom when the earthquake happened? —Yes, but they have been saved. A. There were B. Was there C. There are D. Were there 2. —I’m hungry. ______ there any bread in the fridge, Mum? —None, but we have cakes. Would you like to have one? A. Is B. Are C. Will D. Was 3. —Which would you like, tea or coffee? —Either ______ OK, but I prefer coffee ______ milk. A. is; has B. are; with C. is; with D. are; has 4. This pair of shoes ______ me well, but the shoes ______ expensive. A. fit; are B. fits; are C. fits; is D. fit; is 5. This pair of pants ______ mine. Yours may ______ on the bed. A. is; be B. are; be C. are; are D. is; is 6.Climbing hills ______ good for our health. A. are B. is C. was D. were 7. —What ______ the number of the students in your school? —About two thousand. A number of them ______ from the countryside. A. is; are B. is; is C. are; is D. are; are 8. —When will the railway that connects the two cities open? —______ next year. Only two thirds ______ been built. A. Until; has B. Until; have C. Not until; has D. Not until; have 9. Andy, you’d better not eat meat only. You should know milk and fruit ______ good for you. A. is B. are C. was D. were 10. Bread and butter_____ for breakfast in many Chinese homes nowadays. A. serve B. servers C. is served D. are served 11. —Do you need more time to complete the task? —Yes. Another ten days ______ enough. A. is B. was C. are D. were 12. Zhang’s family ____ rather big, with twelve people in all. A. is B. are C. being D. was 13.The young ______ hard to get a better life these days. A. is working B. have worked C. has worked D. are working 14. The Whites ______ the holiday in Europe next week. A. is going to take B. are going to take C. takes D. take 15. Look! The police ______ the food onto the bank of the river. A. am carrying B. is carrying C. are carrying D. are carried 16. The team ______ the best in the game and the team ______ trying their best to play. A. is; is B. is; are C. are; are D. are; is 17. I hope there ______ good news tonight. A. is B. are C. was D. were 18. —Which ______ your chair, Paul? —The red one. It’s near Jim’s. A. is B. are C. was D. were 19. —Do you know where the cards are? —Yes. There ______ some in my bedroom. A. is B. are C. was D. were 20. —Neither Tony nor I ______ interested in playing Weibo. —You are out. A. am B. is C. are D. will be 21.Not only my friends but also I ______ interested in football and Messi is our favorite star. A. be B. am C. is D. are 22. There ______ some milk and two eggs on the table. A. is B. are C. has D. have 23. There ______ a book and some pens in the bag. Please give them to the old man. A. be B. are C. is D. have 24. There ______ lots of sheep and pigs on my uncle’s farm now. A. was B. were C. is D. are 25. On the wall______ two large portraits. A. hangs B. hang C. hanged D. hanging
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【单选题】下列关于生物学实验操作、实验结果、实验现象及原理的描述中,正确的是 [     ]
A.
用纸层析法分离菠菜滤液中的色素时,橙黄色的色素带距离所画滤液细线最远
B.
用低倍镜观察不到紫色洋葱鳞片叶外表皮细胞的质壁分离和质壁分离复原过程
C.
探究酵母菌的呼吸方式可以用是否产生二氧化碳来予以确定
D.
可用本尼迪特试剂鉴定甘蔗中的蔗糖
【单选题】在“观察人的口腔上皮细胞”的实验中,下列关于显微镜操作方法的说法正确的是(     )
A.
通常用右眼进行观察
B.
镜筒下降时,眼睛要看着目镜
C.
对光时,转动反光镜,通过目镜看到白亮的圆形视野即可
D.
要将偏左下方的物像移到视野中央,应向右上方移动玻片标本
【简答题】转筒真空过滤机 的特点是:同 、不同 进行不同的操作; 板框过滤机 的特点是:同 、不同 进行不同的操作。
【单选题】过滤是初中学生要求掌握的基本实验操作技能之一.下列关于过滤操作不正确的是(  )
A.
滤纸的边缘要低于漏斗口
B.
液面不要低于滤纸边缘
C.
玻璃棒要靠在三层滤纸的一边
D.
漏斗下端的管口要紧靠烧杯内壁
【多选题】关于本实验操作,下列操作正确的是:
A.
在三口瓶中先倒入浓硫酸,再在振荡下慢慢加入乙醇
B.
加入沸石
C.
温度计水银球浸入液面以下
D.
冷凝水后进前出
【多选题】下列关于化学实验教学特征的说法正确的有()
A.
化学实验教学是以基本操作、基本技能训练为基础
B.
其教学内容丰富多彩、生动直观
C.
化学实验教学是以化学基础理论为线索,科学方法为工具,通过化学实验观察来揭示物质及其变化的规律
D.
中学化学实验教学的过程始终伴随着辩证唯物主义思想
【单选题】关于操作手册的规定,下列陈述不正确的是
A.
实验室所使用的检验方法都应有操作手册
B.
制定的操作手册应符合实际工作情况并为操作人员所熟悉、遵守
C.
手册必须由实验室负责人批准、签字并注明日期
D.
更换领导或改变手册内容必须由现任实验室负责人批准、签字并注明日期
E.
实验室必须保存有开始和停止使用的操作手册的副本,并保存到停止,使用一年后才可销毁
【单选题】下列关于实验基本操作的叙述不正确的是(  )
A.
使用分液漏斗和容量瓶时,首先要检查其是否漏液
B.
蒸馏实验中,要在蒸馏烧瓶中加入几粒沸石或碎瓷片,以防止液体暴沸
C.
将浓硫酸倒入盛水的量筒中进行稀释
D.
用蒸发皿进行加热蒸发时,不垫石棉网
【单选题】关于本实验中的称量操作,下列说法正确的是_____
A.
重铬酸钾用分析天平准确称量,亚铁盐用普通电子天平
B.
亚铁盐用分析天平准确称量,重铬酸钾用普通电子天平
C.
都用分析天平
D.
都用普通电子天平
【单选题】晶闸管供电调速系统的机械特性分为连续段和不连续段,不连续段机械特性特点是()。
A.
机械特性硬
B.
机械特性软
C.
机械特性硬,理想空载转速高
D.
机械特性软,理想空载转速高
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