Which of the followings is Ser/Thr kinase? A: Protein kinase A B: MAPK C: Protein kinase C D: Protein kinase G E: MEK

下列各组角中,可以作为向量的方向角的是(<br/>) A: $\frac{\pi }{3},\,\frac{\pi }{4},\,\frac{2\pi }{3}$ B: $-\frac{\pi }{3}\,,\frac{\pi }{4}\,,\frac{\pi }{3}$ C: $\frac{\pi }{6},\,\pi ,\,\frac{\pi }{6}$ D: $\frac{2\pi }{3},\,\frac{\pi }{3},\,\frac{\pi }{3}$

时，三个振幅矢量的合矢量等于3A；当$\Delta\varphi$等于 A: $\pi/3$或$2\pi/3$ B: $\pi/3$或$4\pi/3$ C: $2\pi/3$或$4\pi/3$

$\arctan (-\sqrt{3})=$ A: $-\frac{\pi}{3}$ B: $\frac{\pi}{6}$ C: $\frac{\pi}{3}$ D: $-\frac{\pi}{6}$

Which of the following signaling molecules could be directly activated by Ca ion binding? A: cAMP B: Calmodulin C: Protein kinase A D: Protein kinase B E: Protein kinase G

以下声明常量不正确的是（  ） A: final int PI=3; B: final PI=3; C: static final int PI=3; D: public static final int PI=3;  

以下声明常量不正确的是（ ） A: final int PI=3; B: final PI=3; C: static final int PI=3; D: public static final int PI=3;

以下声明常量不正确的是（  ） A: final int PI=3; B: final PI=3; C: static final int PI=3; D: public static final int PI=3;  

函数$f(x) =sin^3 x, x \in &#91;0,2 \pi&#93;$的单调递减区间为 A: $[\frac{\pi}{2},\frac{3}{2} \pi]$ B: $[\frac{3}{2} \pi,2 \pi]$ C: $[0,\frac{\pi}{2}]$ D: $[0,2 \pi]$

-1+i的辐角是多少?() A: \pi/4 B: \pi/2 C: 3\pi/4 D: \pi