中国最著名的皇家园林、有“万园之园”之称的园林叫什么?()
A.颐和园
B.避暑山庄
C.北海公园
D.圆明园
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根据短文内容,完成下面各题。
Mary is an English girl, but she lives in China. She is six. Her mother says to her, "You are
six now, Mary. You are going to school . I think it is very good . It's a nice school . ''
"Is it a Chinese school ?" Mary asks . "Yes, it is.'' her mother says.
It is September (九月) and the new school year begins. Mary walks to school every day.
She likes her lessons and her classmates very much. Her classmates like her, too . Mary
can speak a little Chinese . She likes China . She likes Chinese people and Chinese food
a lot
1. Mary comes from ______.
2. She lives in ______ now.
3. She goes to a ______school.
4. She ______ to school every day.
5. She can ______ a little Chinese.
把纯净的甲烷与氯气的混合气放在集气瓶中,用玻璃片盖好瓶口,放在光亮的地方一段时间后,下列说法中,不正确的是( ) A.气体发生爆炸反应 B.瓶内气体的颜色变浅 C.用一根蘸有浓氨水的玻璃棒伸入瓶内时有白烟产生 D.集气瓶壁有油状液体生成 |
肠道杆菌中可分解乳糖产酸、产气的是()
A.大肠埃希菌
B.变形杆菌
C.痢疾志贺菌
D.伤寒沙门菌
E.猪霍乱沙门菌
当介质是水、压缩空气的管道采用法兰连接时,垫片材料应是()。
A、橡胶板
B、夹布橡胶板
C、石棉板
D、环氧树脂板
属于输血传播性疾病的是
A.乙型、丙型肝炎
B.艾滋病
C.梅毒
D.巨细胞病毒感染
E.弓形体病