女，55岁。行上颌结节注射麻醉后，突然感到心悸、头晕、头痛、脉搏快而有力，血压升至1

The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals, (51) this is largely because, unlike animals, we stand upright. This means that our noses are (52) to perceiving those smells which float through the air, missing the majority of smells which stick to surfaces. In fact, (53) , we are extremely sensitive to smells, even if we do not generally realize it. Our noses are capable of (54) human smells when these are diluted to far below one part in one million.

Strangely, some people find that they can smell one type of flower but not another, (55) others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate (56) smell receptors in the nose. These receptors are the cells which sense smells and send (57) to the brain. However, it has been found that even people insensitive to a certain smell at first can suddenly become sensitive to it when (58) to it often enough.

The explanation for insensitivity to smell seems to be that the brain finds it (59) to keep all smell receptors working all the time but can (60) new receptors if necessary.

55().

A.when 

B.since 

C.for 

D.whereas

用所给单词的正确形式完成句子。

1. Sandra Clark _____ (eat) eggs and apples every day.

2. Some _____ (strawberry) are on the table.

3. My sister _____ (like) bread and milk for breakfast.

4. We should (应该) eat _____ (good) every day.

5. Tony likes _____ (run).

某氯碱厂每天需要90℃食盐饱和溶液10t，一年按330天计算，需要（）t含量为93%的食盐。（食盐90℃时的溶解度为39g）。

A、995.59；

B、982.37；

C、998.56；

D、979.20。

女性，36岁。因风心病长期服用地高辛及利尿剂，6小时前突然出现上腹痛，呕吐，体温37.5℃，血淀粉酶400U，最可能的诊断是（）

A.急性肠梗阻

B.急性胆囊炎

C.急性胰腺炎

D.急性阑尾穿孔

E.胆石症

累进税率