题目:The last paragraph suggests that Thomas ______.
A. works full-time in a diabetes charity
B. employs 22 people for his website
C. helps diabetics in his own way
D. ties to find a……继续阅读 »
题目:What did the author remember most fondly of her train trip
A. The friendly country people.
B. The mountains along the way.
C. The crowds of people in the streets.
D. The simple ……继续阅读 »
题目:在牛蛙的脊髓反射实验中,若要证明感受器是完成曲腿反射必不可少的环节,下列操作不合适的是
A. 环割后肢脚趾尖皮肤
B. 用探针破坏牛蛙的脊髓
C. 用0.5%HCl溶液刺激趾尖
D. 剪去牛蛙的脑
喵查答案:B
该实验是证明感受器是完成屈腿反射的必要环节,则感受器应为实验中的单一变量即感受器的有无,破坏牛蛙的脊髓无论有无感受器都不会发生屈腿反射。
……继续阅读 »
题目:在牛蛙的脊髓反射实验中,若要证明感受器是完成曲腿反射必不可少的环节,下列操作不合适的是
A. 环割后肢脚趾尖皮肤
B. 用探针破坏牛蛙的脊髓
C. 用0.5%HCl溶液刺激趾尖
D. 剪去牛蛙的脑
喵查答案:B
该实验是证明感受器是完成屈腿反射的必要环节,则感受器应为实验中的单一变量即感受器的有无,破坏牛蛙的脊髓无论有无感受器都不会发生屈腿反射。
……继续阅读 »
题目:_____you may have, you should gather your courage to face the challenge.
A. However a serious problem
B. What a serious problem
C. However serious a problem
D. What serious a pr……继续阅读 »
题目:The author thinks that with full government funding
A. teachers are less satisfied
B. students are more demanding
C. students will become more competent
D. teachers will spend l……继续阅读 »