牡丹皮的重要化学成分
A.芍药苷B.挥发油中以α、β-桉油醇为主,约 94%~98%C.挥发油以桂皮醛为主D.桃叶珊瑚苷E.含生物碱以小檗碱为主
参考答案:A
When she first arrived in China, she wondered what the future might have ______ for her, but now all her worries are gone.
A.in need
B.in time
C.in preparation
D.in store
组塔应设置临时地锚(含地锚和桩锚),()应满足相连接的绳索的受力要求。
A.地锚坑深度
B.拉线强度
C.马道长度
D.锚体强度