我国最早记载制成乌头碱结晶文献是
A．《本草纲目》
B．《本草蒙荃》
C．《炮制大法》
D．《白猿经》
E．《本草备要》
参考答案：D
After Yang Li wei succeeded in circling the earth, _____ our astronauts desire to do is walking in space. [ ]
A. where
B. what
C. that
D. how
(火车) I _____________ to Beijing.
(飞机) We go to Canada by ______________.
The children _____________ to school.
Let's _____________.
We can _____________.