取粉末置白纸上，用火隔纸烘烤则熔化，但无扩散的油迹，对光照视呈鲜艳的血红色，以火燃烧则产生呛鼻烟气的药材是E．
查看答案
What does the "invisible hand"(Paragraph 5) refer to？
A. Supply and demand.
B. Laissez faire.
C. Self-interest.
D. Market mechanism.
A．as a resultB．in the endC．in the wayD．above all things
A. as a result
B. in the end
C. in the way
D. above all things
听力原文：M: I think it's starling to snow:
W: Starting to snow？ The ground's already covered.
What does the woman mean？
A. They're ready for the snow.
B. Once it starts, it'll snow a lot.
C. It bas been snowing for some time.
D. The winter has just begun.
微信支付 
支付宝支付