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【简答题】
坚定社会主义核心价值观自信要求是什么
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举一反三
【单选题】It costs about _______ times as much to attract a new customer as it costs to keep an old one.
A.
two
B.
three
C.
four
D.
five
【单选题】佛尔哈德法返滴定测Iˉ时,指示剂必须在加入过量的AgNO3 溶液后才能加入,这是因为( )
A.
AgI 对指示剂的吸附性强
B.
AgI 对Iˉ的吸附强
C.
Fe 3+ 氧化Iˉ
D.
终点提前出现
【判断题】It costs about five times as much to get a new customer as it does to keep an existing customer.
A.
正确
B.
错误
【单选题】佛尔哈德法返滴定测I一时,指示剂必须在加入AgNO3溶液后才能加入,这是因为( )。
A.
AgI对指示剂的吸附性强
B.
AgI对I一的吸附性强
C.
Fe3十能将I一氧化成I2
D.
终点提前出现
【单选题】It has been observed that a product's production costs decline by some quantity about each time, cumulative output:
A.
increases by twenty five percent.
B.
quadruples.
C.
doubles.
D.
triples
【简答题】Peter: Hello, I want to order some waterproof cloth. How many types do you have? Salesgirl: We have five different types. Here’s the price list. Peter: I think this type is quite good. But it’s a bit ...
【单选题】--- Can you deliver the furniture to my place, please? --- It depends on where you live, s ir. --- In Strawberry Town. --- _______ . But it costs five dollars.
A.
Sorry, we can ’ t
B.
Yes, we can deliver there
C.
We know little about the town
D.
We have a lot of goods to deliver
【单选题】In his example the author tells his readers that ______.
A.
it is important to build up one's physical capacity
B.
it is no good having much physical training
C.
it is more important to know one's capacity than to win the race
D.
it is important to have physical training while one trains his mind
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