题目

Germs(细菌) are everywhere. You can’t see them, but they are on your desk, on your computer, and even in the air!Like people, germs move around the world. They fly with us on planes. When food, clothes, and other things travel around the world, germs travel, too. Some germs are safe, but some are dangerous. Germs cause illnesses like colds and the flu. Warmer Weather Brings GermsThe world’s weather is changing. Cooler countries are getting warmer, so insects from hot countries can move there. Some of these insects, like mosquitoes, carry dangerous germs. These germs cause headaches, feve与神经调节相比，体液调节的特点是A.作用时间比较长B.作用范围比较局限C.反应速度比较慢D.主要通过激素传递信息