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【单选题】
Lidocaine 比 Procaine 作用时间长的主要原因是A.
Procaine有芳香第一胺结构
B.
Procaine 有酯基
C.
Lidocaine有酰胺结构
D.
Lidocaine 的中间部分较 Procaine 短
E.
酰胺键比酯键不易水解
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反馈参考答案：
举一反三
【单选题】The more _____ you listen to the tape, the _____ you will find it to understand．
A.
carefully; more easily
B.
careful; more easily
C.
carefully; easier
D.
careful; easier
【单选题】_____ more and more students graduating from college, it is harder for them to find suitable jobs.
A.
For
B.
As
C.
With
D.
Because
【简答题】Advances in medical technology (have) made it possible for people (live) longe
【单选题】______, the world may have a population of 12 billion in a century.
A.
If man can live longer in the future
B.
If the science of medicine is developing fast enough
C.
If the population growth is not reduced
D.
If the earth is able to provide a good life for more people
【单选题】The existing mall contains three department stores, nine restaurants, more than fifty_____shops, and a movie theater.
A.
retailed
B.
retailer
C.
retailing
D.
retail
【单选题】Physical exercises and freedom from worry might be the two most important secrets of longevity.
A.
True
B.
Fasle
【多选题】下面产品生命周期对产品定位的影响描述正确的是
A.
随着产品进入不同的生命周期，其定位和肩负的使命也是不同的。
B.
在导入期，一般定位于体验产品，通过预售、新品体验等方式让消费者慢慢熟知；
C.
进入上升期后，产品逐步成熟并被市场所接受，成为店铺中的利润产品；
D.
随着进一步的市场推广，产品积累了足够的市场人气和销量，达到鼎盛期，这时可以通过各类营销活动将这款产品打造成人气产品，成为店铺中的销售爆款；
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