题干

在脊椎动物中,只有鱼类、两栖类和爬行类能随环境改变而迅速发生色变。其中避役是出名的“变色龙”,能在较短的时间内(小于5min)完全改变体色,比蛙等变色动物快得多,它变色的调节机制是()

A:激素调节

B:神经调节

C:神经一激素调节

D:激素一神经调节

上一题 下一题 0.0难度 选择题 更新时间:2017-03-03 12:53:13

答案(点此获取答案解析)

B

同类题5

完形填空

    In August 1999,Yuriko noticed that her daughter,Ayako,was looking thin and pale,1 she insisted that the 22-year-old see a doctor.As they waited for the rest results,the doctor2 gave Yuriko a note while her daughter wasn't noticing.

    In the restroom,Yuriko opened the note,“It is stomach cancer,“said the doctor.“Please3There is no time.”

On September 21,Ayako had a(n)4Three quarters of her stomach were removed.The doctor 5 the situation to Yuriko but the medical terms sounded like a foreign language.

    Ayako was put on anti-cancer drugs,and over the next three months,she 6 from side effects,and lost seven kilograms.

    Yuriko decided to do more to 7 her daughter.She read all kinds of books on cancer.As a single mother,she had no one to share her 8with.

9 the difficulties,Yuriko was able to help her daughter.When Ayako started experiencing breathing difficulties,Yuriko 10 if it could be a side effect of the anti-cancer drug.She told Ayako's doctor and he 11to take her off the drug.

    12in November 2002,Ayako's treatment came to an end.Although she felt her pain 13Yuriko couldn't forget how lost and 14 she felt during her daughter's treatment.She wrote a letter to the local newspaper 15the creation of a support group for cancer patients.

    Phone calls and letters 16 her idea started pouring in.In December 2002,Yuriko formally17 Ikkikai,roughly meaning “sharing the joy”,with the18of providing hope and information for people with cancer,and their families.

    Ikkikai's message has begun to 19Yuriko says,“The simple act of talking to other people who understand your problems can make the greatest 20I hope that more people would join in the group.”