控制含水系统发育的,主要是()结构;控制地下水流动系统发育的,主要是()。
参考答案:地质;水势场
– Do you know _____ yesterday ?
– It was at 8 o’clock in the morning.
A.when did she come
B.when was it that she came
C.when she came
D.when it was that she came
甲状旁腺素对血液中钙磷浓度的调节作用表现为()
A.降低血钙浓度,升高血磷浓度
B.升高血钙浓度,降低血磷浓度
C.升高血钙浓度,不影响血磷浓度
D.降低血钙浓度,不影响血磷浓度
E.升高血钙、血磷浓度