杜仲与续断均具有的功效是()
A.行血脉
B.止呕吐
C.逐寒湿
D.补肝肾
E.定喘咳
参考答案:D
解析:两者都可以补肝肾,强筋骨,安胎。
— Who’s singing in the next room?
— It ______ be Mary. She ______ New York.
A.mustn’t, is in
B.must, has gone to
C.could, has been in
D.can’t, has gone to
焊接残余变形和残余应力是焊接结构的主要缺点。()