高渗性脱水时,血清Na+至少高于
A.150mmol/L
B.155mmol/L
C.160mmol/L
D.165mmol/L
E.170mmol/L
参考答案:A
再热器控制安全阀启座压力定值应为()倍的工作压力。
A、1.10
B、1.25
C、1.50
D、1.05
Looking out of the window of my room, ___ a tall tree in the yard.
A.there was
B.there were
C.I saw
D.there stood