HCO-3及PaC02下降()。
A.代谢性酸中毒
B.代谢性碱中毒
C.呼吸性酸中毒
D.呼吸性碱中毒
E.复合型酸碱紊乱
参考答案:D
.When I moved to a new community, I found it different from -----------I had stayed in before.
A.one
B.that
C.it
D.the one
声程大于等于1.6N后声场就进入()。
A.近场区
B.扩散区
C.非扩散区
D.盲区