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问题 单项选择题

芳磺酸盐的碱熔是工业制备酚类的重要方法，对其说法错误的是（）。

A.该方法工艺简单，适用于多种酚类的制备

B.反应一般在高温下进行

C.该方法常用苛性钠或苛性钾做碱熔剂

D.该方法工艺先进，几乎不产生废液

答案

参考答案：D

单项选择题

下列哪项不是白喉的流行病学特点()

A．通常散发、偶有流行或暴发

B．人对白喉普遍易感

C．6个月以下发病率最高

D．病后有较持久免疫力

E．病人和带菌者为传染源
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单项选择题

What’s your earliest childhood memory Can you remember learning to walk Or talk The first time you heard thunder or watched a television program Adults seldom (1) events much earlier than the year or so before entering school, (2) children younger than three or four (3) retain any specific, personal experiences.

A variety of explanations have been (4) by psychologists for this "childhood amnesia". One argues that the hippo-campus; the region of the brain which is (5) for forming memories, does not mature until about the age of two. But the most popular theory (6) that, since adults don’t think like children, they cannot (7) childhood memories. Adults think in words, and their life memories are like stories or (8) one event follows (9) as in a novel or film. But when they search through their mental (10) for early childhood memories to add to this verbal life story, they don’t find any that fit the (11) . It’s like trying to find a Chinese word in an English dictionary.

Now psychologist Annette Simms of the New York State University offers a new (12) for childhood amnesia. She argues that there simply aren’t any early childhood memories to (13) . According to Dr. Simms, children need to learn to use someone else’s spoken description of their personal (14) in order to turn their own short-term, quickly forgotten (15) of them into long-term memories. In other (16) , children have to talk about their experiences and hear others talk about (17) --Mother talking about the afternoon (18) looking for seashells at the beach or Dad asking them about their day at Ocean Park. Without this (19) reinforcement, says Dr. Simms, children cannot form (20) memories of their personal experiences.

Notes: childhood amnesia 儿童失忆症。

（2）（）

A. now that

B. even if

C. as though

D. just as
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