有髓神经纤维轴突外包绕的髓鞘是由哪种细胞及其细胞膜构成（）
A.浆细胞
B.淋巴细胞
C.Schwann细胞
D.神经细胞
E.胶质细胞
参考答案：C
Hundreds of people had to be _______ because the stadium was so full that it couldn't even admit one drop in.[ ]
A. looked into
B. turned away
C. picked up
D. sent for
总结一般不用来（）
A.阐明并提炼来访者大段的陈述
B.阐明复杂的话题
C.开始新的话题
D.结束一次会谈
