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【单选题】
叶酸缺乏致巨幼红细胞性贫血的临床表现不包括（ ）。A.
婴幼儿常见
B.
肝脾淋巴结可肿大
C.
食欲不振，呕吐，腹泻
D.
面色蜡黄
E.
动作及智力发育落后或倒退
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举一反三
【单选题】--- Why does she look so unhappy? --- Her mother doesn’t _______ of her going to study in the United States alone.
A.
agree
B.
permit
C.
approve
D.
prove
【单选题】Why does the author cite the study by Bangor University and the Royal Mail Service?
A.
To compare similar responses in different settings.
B.
To provide further evidence for his own observation.
C.
To offer a scientific account of the brain's functions.
D.
To describe emotional responses in online shopping.
【单选题】Why does Marion Petrie plan to study the offspring of different peacocks?
A.
To check whether the birds have inherited diseases.
B.
To discover whether the breed is becoming bigger in general.
C.
To learn about the reasons behind the peahen's choice of mates.
D.
To study the development of various species.
【单选题】消费者若是到商场或电器超市选购等离子或液晶电视，商家通常都会播放数码影片，画 面效果很好看。不过，等消费者一回到家中，并接上传统的有线电视，则画面效果通常都会下降。 以下哪项如果为真，最能解释上述矛盾?
A.
尽管画面效果下降很多．但其音响效果并不会产生变化
B.
这些等离子或液晶电视的价格都比较便宜。没有一些花哨的功能
C.
等离子及液晶电视都是数字电视，而有线电视采用的是模拟信号来播放电视节目
D.
有些品牌的电视画面效果并不会下降得太多，画面品质有一定的保证
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