故障信息的符号用于表示传达某种信息。
参考答案:对
Where's my key?[ ]
A. They are on the desks.
B. It's near the door.
下列哪项可使微循环的阻力增加()
A.二氧化碳蓄积
B.血pH降低
C.血K+浓度增加
D.血液中腺苷浓度增加
E.血氧分压升高