祝贺朋友迁居或送给长辈宜送（）。
A.花篮
B.花束
C.襟花
D.盆花
参考答案：D
B．保持温度不变，减小压强
C．保持体积不变，降低温度
D．保持体积不变，减小压强
Hu Jin had promised that she would meet Li Fang after work, but she didn’t ______.
A．turn on
B．turn down
C．turn off
D．turn up
