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【单选题】
溶剂提取法所用提取工艺中提取效率最高,溶剂用量最小的是( )A.
回流提取
B.
连续回流提取
C.
渗漉法
D.
煎煮法
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举一反三
【单选题】According to the story, the writer___________.
A.
likes sitting on the bank of the river when it’s fine
B.
rarely goes to the river
C.
likes playing games on the bank
D.
likes rowing on the river on Sundays
【单选题】发展社会主义民主政治,建设社会主义政治文明,根本保证的是()。
A.
坚持人民当家作主
B.
坚持中国共产党的领导
C.
坚持四项基本原则
D.
坚持党的领导,人民当家作主和依法治国的有机统一
【单选题】1 The writer ____
A.
(A) likes sitting on the bank of the river when it's fine
B.
(B) rarely goes to the river
C.
(C) likes sitting on the bank of the river all the time
D.
(D) likes sitting on the bank of the river on Sundays
【简答题】给下列化合物命名或写出结构简式。 1. 2. 3. 4．2，2，5-三甲基-4-异丙基庚烷 5．异戊烷 6．新己烷 7. 8.
【单选题】In the passage the writer_______.
A.
encourages people to go to the stock market
B.
assures people that buying stocks is good investment
C.
warns people to be careful in buying stocks
D.
explains how stock goes up when factories or companies run well
【单选题】Read the passage and choose the correct ones.I've got a brother who is two years older than I am. Sometimes he's OK but other times he is a real pain in the neck. I'll give you some examples. Yesterda...
A.
The writer goes out every night.
B.
The writer's parents worry when she goes out at night.
C.
The writer worries when she doesn't go out at night.
D.
The writer's parents only worry a little when she goes out at night.
【单选题】DOM中______方法可用于创建一个元素节点。
A.
document.createElement()
B.
document.createTextNode()
C.
document.createAttribute()
D.
document.createEvent()
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