用配方法解一元二次方程x2+6x﹣16=0，配方后的方程为（ ）
A：（x+3）2=25
B：（x﹣3）2=25
C：（x+3）2=16
D：（x+9）2=25
离体的叶绿体在光照下稳定进行光合作用时，如果突然中断CO2气体的供应，短时间内叶绿体中C3和C5相对含量的变化是（ ）
Hello! I'm Dolly. ①I work at a hospital. ②I'm a nurse. My house is not far from the hospital. ③So I walk to work.④And my brother is a teacher.⑤He goes to work by car.
①____ ②____ ③____
④____ ⑤____
A. How does he go to work?
B. Where do you work?
C. What does your brother do?
D. How do you go to work?
E. What do you do?
描写春天的成语很多，请写四个。
____ ____ ____ ____
