膝腱反射的反射中枢位于
A．腰髓1～2节 B．腰髓2～4节 C．腰髓3～5节D．骶髓1～2节 E．骶髓2～4节
参考答案：B
These flowers are pleasant to ______.
A．be looked at
B．look at
C．looking at
D．for looking at
抗日战争期间，最能体现国共合作的战役是台儿庄战役。 [ ]
