关于少突胶质细胞正确的是()。
A.有吞噬功能
B.包被无髓神经纤维
C.引导再生轴突生长
D.参与形成髓鞘
E.一个细胞可形成多个结间体
参考答案:D, E
读下图完成:
此图示时间为地球位于远日点时,关于上图中河流与潜水面的关系,正确的是
A.恒河河沿岸的潜水面为b状态
B.黄河中下游沿岸的潜水面为b状态
C.密西西比河沿岸的潜水面为a状态
D.开普敦地区的潜水面为b状态
Having introduced the new equipment, the company turned out ________ in 2008 as the year before. [ ]
A. as three times cars
B. three times as many cars
C. as many cars as three times
D. three times more cars than