龙眼肉与大枣的共同功效是()
A.敛汗
B.养血
C.益气
D.安神
E.滋阴
参考答案:B, C, D
My watch is under______, so they'll repair it for free. [ ]
A. safety
B. defence
C. guarantee
D. pattern
日常生活中的下列变化,只发生了物理变化的是 ( )
A.蔬菜腐烂
B.面包发霉
C.灯泡通电后发亮
D.菜刀生锈