问题 选择题

铝在人体内积累可使人慢性中毒,引起老年痴呆症,1989年世界卫生组织正式将铝确定为“食品污染源之一”而加以控制.在下列场合无须对铝的使用加以控制的是(  )

A.制电线

B.制牙膏皮

C.制炊具

D.包装糖果

答案

A、用铝制作电线与人体健康无关,无需控制,故A正确;

B、牙膏用于刷牙,用铝制作牙膏皮会使铝与人体接触,需要加以控制.故B错误;

C、用铝制作炊具时,会使铝进入人体,需要加以控制,故C错误;

D、用铝制作糖果包装会使铝进入人体,需要加以控制,故D错误.

故选:A.

单项选择题 A1/A2型题
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 Oceanz 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。

(13)()

A.recall

B.remember

C.reflect

D.respond