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【多选题】
50升纯碱溶液中含碳酸钠0.010g,则该溶液中碳酸钠的质量浓度为( )。A.
0.010 g·L -1
B.
10 mg·L -1
C.
0.020 g·L -1
D.
20 mg·L -1
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举一反三
【多选题】Combined the following 3 simple sentences into 1 longer sentence. Choose all the possible versions. "Jane Austen is an author. She is English. She is well known and beloved."
A.
Jane Austen is a well-known and beloved English author.
B.
Jane Austen is an English author who is well known and beloved.
C.
Jane Austen is an English author, well known and beloved.
D.
Jane Austen, an English author, is well known and beloved.
【简答题】The author is an American novelist and poet best known as the author of the novel ( ).
【单选题】2018年12月29日,第十三届全国人民代表大会常务委员会第七次会议审议通过了《中华人民共和国公务员法(修订草案)》,国家主席习近平颁布第20号主席令, 宣布修订后的《中华人民共和国公务员法》自( )起施行 。
A.
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B.
2019年1月1日
C.
2018年12月29日
D.
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【单选题】The author of the text is most probably of the opinion that _____.
A.
the sea is an inexhaustible resource of food supply.
B.
the shortage of food supply mainly results from unrestricted population growth.
C.
the inadequate food supply is chiefly caused by the negligence in exploration of the sea.
D.
it is the population projects, rather than the development of sea resources, that can improve the nutritional conditions of mankind.
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