细长圆柱形，表面淡黄白色，粗糙的药材为
A．羌活B．前胡C．白芷D．南沙参E．北沙参
参考答案：E
---What do you usually do when it is raining?
---I often ______ TV.
A．are watching
B．watch
C．watches
D．watching
（1）1袋水泥重100千克，______袋水泥重1吨．1桶油重200千克，10桶油重______千克，合______吨．
（2）3000千克=______吨5000克=______千克 4吨=______千克6000千克=______吨．
