题目

 The government knows what to __________ to control the high CPI with the purpose of ensuring people’s living level. A. take up         B. take in           C. take over          D. take down 答案：A19．已知β为第二象限角，且满足$\frac{{2{{tan}^2}β}}{3tanβ+2}=1$（1）求$sin（β+\frac{3π}{2}）$，（2）$\frac{2}{3}{sin^2}β+cosβ•sinβ$．