长时间以来，人们一直认为高胆固醇会导致心脏病。然而，这种观点_爱下问搜题

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问题单项选择题

长时间以来，人们一直认为高胆固醇会导致心脏病。然而，这种观点不正确，因为心脏病患者的胆固醇含量比非心脏病患者的含量还要低。上述论断所隐含的前提是

A．许多没有心脏病的人的胆固醇含量很低。

B．患心脏病不能大量降低人体的胆固醇的含量。

C．荷尔蒙比胆固醇更会使人导致心脏病。

D．心脏病和低胆固醇含量出于同一个原因。

答案

参考答案：B

解析：实际上“吴小东、李明和赵雄也将选修法语”是“郑玲选修法语”的必要条件，结合必要条件的假言推理规则，可得出答案．

多项选择题

关于听神经瘤的MRI表现，描述正确的是（）

A.MRI是检查桥小脑池病变的最佳方法

B.听神经瘤在T₁WI上呈低信号或等信号

C.注射GD-DTPA后听神经瘤可显著增强

D.听神经瘤的钙化、陈旧出血均可导致低信号

E.有囊变或坏死时，肿瘤信号不均匀

完形填空

As Christmas is coming, there are presents to be bought, cards to be sent, and rooms to be cleaned. Parents are faced with difficult jobs of hiding presents from curious young children. If the gifts are large, this is sometimes a real    11 . On the Christmas Eve, young children find the excitement almost unbearable. They are torn between the wish to go to bed early so that Father Christmas will bring them presents quickly and the wish to   12  up late so that they will not   13  the fun. The wish for gifts usually proves stronger. But though children go to bed early, they often lie   14  for a long time, hoping to get a short look at Father Christmas.
Last Christmas, my wife and I   15  hid a few large presents in the storeroom. I   16  the moment when my son, Jimmy, would ask me where that new bike had come from, but fortunately he did not see it.
On Christmas Eve,   17   took the children hours to go to sleep. It must have been nearly   18  when my wife and I went quietly into their room and began   19  stockings. Then I pushed in the   20  I bought for Jimmy and left it beside the Christmas tree. We knew we would not get much sleep that night, for the children were   21  to get up early. At about five o’clock the next morning, we were   22  by loud sounds coming from the children’s room—they were shouting excitedly!   23   I had time to get out of bed, young Jimmy came riding into the room on his new bike, and his sister, Mary, followed close behind pushing her new baby carriage.   24  the baby arrived. He moved on the hands and knees into the room dragging a large balloon. We were woken up   25  by them at this time.

D．successfully