君山金龟具有驱寒散热,润肺暖胃,化痰止咳等功效。
参考答案:错
The boy was in the water and his canoe was_______ away.
A.running
B.floating.
C.flowing
D.pulling
要约的撤回发生在()
A、要约生效之前
B、要约生效之后对方承诺之前
C、对方承诺之后
D、都可以