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【多选题】
提取原生苷可选择的方法有()A.
酸水提取
B.
冷水浸渍
C.
沸水煎煮
D.
60% 以上的乙醇回流
E.
将药材用 CaCO 3 拌匀后再用沸水提取
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举一反三
【判断题】The relationship between the value of a bank and its credit rating is convex, which suggests that there is a maximum or optimal value at a specific credit rating.
A.
正确
B.
错误
【单选题】He stood up, excused himself, and ____ our of the meeting.
A.
walking
B.
to walk
C.
while walking
D.
walked
【单选题】下述字典中,其中rating的value的值,是电影的评分值,titile是电影的名字,若想获取电影“无双”的评分值,正确的代码是() my_dict={ "count":2, "start":0, "subject_collection_items":[{ "rating":{"count":11223,"value":5.2}, "title":"铁血战士", "year":2018, "ac...
A.
my_dict["subject_collection_items"]["rating"]["value"]
B.
my_dict["subject_collection_items"][1]["rating"]["value"]
C.
my_dict["subject_collection_items"][1]["value"]
D.
my_dict[1]["rating"]["value"]
【单选题】下述字典中(和第5题字典一样),若要获取所有电影的名字,正确的代码是() my_dict={ "count":2, "start":0, "subject_collection_items":[{ "rating":{"count":11223,"value":5.2}, "title":"铁血战士", "year":2018, "actor":["波伊德·霍布鲁克", "崔凡特·罗兹", "雅各...
A.
film_list=[] for item in my_dict["subject_collection_items"]: film_list.append(item["title"]) print(film_list)
B.
film_list=[] for item in my_dict: film_list.append(item["title"]) print(film_list)
C.
film_list=[] i=0 for item in my_dict["subject_collection_items"]: film_list[i] = item["title"] i += 1 print(film_list)
D.
film_list=[] for item in my_dict["subject_collection_items"]: film_list.append(item) print(film_list)
【单选题】企业利用消费者仰慕名牌商品或名店的声望所产生的某种心理来制定商品的价格，故意把价格定成整数或高价的定位方法是指( )。
A.
声望定价
B.
尾数定价
C.
招徕定价
D.
基点定价
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