下列哪种物质引起的食物中毒临床上表现为胃肠道症状（）。 A.N-

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问题单项选择题 B1型题

下列哪种物质引起的食物中毒临床上表现为胃肠道症状（）。

A.N-亚硝胺

B.3-硝基丙酸

C.龙葵素

D.河豚毒素

E.单端孢霉烯族化合物

答案

参考答案：E

解析：1.单端孢霉烯族化合物和3-硝基丙酸分别由镰刀菌和霉变甘蔗产生属于霉菌毒素中毒，河豚毒素属于动物食品中毒，龙葵素由发芽马铃薯产生引起植物性食物中毒，因此选A。2.单端孢霉烯族化合物引起的食物中毒临床上以恶心、呕吐等胃肠道症状为主，因此选E。

阅读理解

阅读下面短文，根据所给语境，按要求完成下列各题。

Deserts and Good Land

Scientists are trying to turn deserts into good land again. They want to bring water to the deserts, so

people can live and grow food there. However, more and more land is becoming desert. Why? Scientists think

that people are doing bad things to turn good land into desert.

①地球上的一些地方雨量不足, but they still do not become deserts. This is because green plants are

growing there. Small green plants and grass are very important to dry places. Plants do not let the hot sun

make the earth even drier.②Plants do not let the wind blow the soil away. When rain falls, plants hold the

water.③Without plants, land can become desert much more easily.

1、将①处的汉语译成英文.

2、将②处的英文译成汉语.

3、将③处的英文译成汉语.

4、What should we do in order to protect good land?

多项选择题

下列（）选项符合对禽流感的叙述。

A.禽流感是禽流感流行性感冒的简称。

B.禽流感可分为高致病性、低致病性和无高致病性禽流感。

C.禽流感潜伏期较长。

D.患禽流感的病禽在病程后期会出现神经症状。