12.某锥体的三视图如图所示,该棱锥的体积是( )

| A. | $\frac{\sqrt{3}}{3}$ | B. | $\frac{5\sqrt{3}}{3}$ | C. | $\frac{4\sqrt{3}}{3}$ | D. | $\frac{7\sqrt{3}}{3}$ |
10.将函数$f(x)=sin(2x+\frac{π}{6})$的图象向左平移$φ(0<φ<\frac{π}{2})$个单位得到y=g(x)的图象,若对满足|f(x1)-g(x2)|=2的x1、x2,|x1-x2|min=$\frac{π}{4}$,则φ的值是( )
| A. | $\frac{π}{6}$ | B. | $\frac{π}{4}$ | C. | $\frac{π}{3}$ | D. | $\frac{5π}{12}$ |
9.向量$\overrightarrow{a}$、$\overrightarrow{b}$、$\overrightarrow{c}$满足$\overrightarrow{a}$+$\overrightarrow{b}$+$\overrightarrow{c}$=0,$\overrightarrow{a}$⊥$\overrightarrow{b}$,($\overrightarrow{a}$-$\overrightarrow{b}$)⊥$\overrightarrow{c}$,$M=\frac{|a|}{|b|}+\frac{|b|}{|c|}+\frac{|c|}{|a|}$,则M=( )
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| A. | 3 | B. | $3\sqrt{2}$ | C. | $2+\frac{{\sqrt{2}}}{2}$ | D. | $1+\frac{{3\sqrt{2}}}{2}$ |