引起肾脏1α-羟化酶活性增加的原因是()A．PTH浓度升高 B．血钙_爱下问搜题

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问题多项选择题

引起肾脏1α-羟化酶活性增加的原因是()

A．PTH浓度升高

B．血钙浓度降低

C．降钙素浓度降低

D．血磷浓度升高

E．1,25(OH)2D3浓度升高

答案

参考答案：A, B, C

选择题

This will be a year of action, and that action should begin by extending unemployment insurance for Americans who were _______ in the economic slowdown.

A．laid out

B．laid off

C．laid on

D．laid down

问答题简答题

下钻至东营组以下地层遇阻，划眼应注意哪些事项？