--Excuse me, where is the post office--Walk along this street and _______ the second turning to the right. A: make B: try C: take

Which tooth position does 24 stand for? A: maxillary left first premolar B: maxillary right first premolar C: mandibular right first premolar D: mandibular left first premolar

‎In the west, it is not polite to call people by their first name. ​

函数$z=\arcsin\dfrac{1}{~\sqrt{x+y}~}$的定义域为( ) A: $\left\{(x,y)\left|~x+y\geq<br/>0\right.\right\}$; B: $\left\{(x,y)\left|~x+y\geq<br/>1~\text{或}~x+y\leq<br/>-1 \right.\right\}$; C: $\left\{(x,y)\left|~x+y\geq<br/>1\right.\right\}$; D: $\left\{(x,y)\left|~x+y\geq<br/>\dfrac{4}{~\pi^2~}\right.\right\}$．

-- Excuse me, where is the post office-- Walk along this street and ______ the second turning on the right. A: make B: try C: take