皮皮学，免费搜题
登录
搜题
【简答题】
餐巾折花的注意事项?
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】下列常见的医用溶液中,溶剂不是水的是( ),常温下溶质是液体的是( ) 葡萄糖溶液,生理盐水,消毒酒精,碘酒
【简答题】阅读理解。 Have you ever heard of the story of Earth Day? Now let me tell you. Earth Day was started 111 1970 by a man named John McConnell from the United States. In the beginning, it was held on one day...
【简答题】阅读理解。 Earth Day is birthday! It is a special day that celebrates the earth. Earth Day was born on April 22, 1970, in San Francisco, California. Every year, over 100 different countries join together i...
【单选题】----- Have you heard of Earth Day ? ----Yes . The first Earth Day ______ in 1970 to educate us to protect our planet .
A.
celebrates
B.
celebrated
C.
is celebrated
D.
was celebrated
【单选题】垄断资本主义为向社会主义转变准备了日益完善的社会经济基础，这是指【】
A.
无产阶级的产生和壮大
B.
社会化大生产的全面发展
C.
社会基本矛盾的加剧
D.
国家管理经济职能的出现
【单选题】下列化合物中与四氢硼钠生成红色反应的是( )。
A.
5,7,4′-三羟基二氢黄酮
B.
4,2′,4′,6′-四羟基查耳酮
C.
5,7,4′-三羟基黄酮
D.
3,5,7,4′-四羟基花色素
E.
7,8,4′-三羟基异黄酮
相关题目：