下列哪些是我们便民服务的内容？（）
A.导向服务
B.供应开水、维修工具
C.应急药品
D.针线包
参考答案：A, B, C, D
– Shall we go to see our teacher tomorrow morning?
– I’d like to, but I ____________ a test between 8 a.m. and 10 a.m. tomorrow.
A．have been taking
B．will be taking
C．am about to take
D．took
蚌式床沙取样器张开挖斗，下放至床面，然后松动扣环上悬索并收绞拉索，使挖斗藉自重作用抓取（）。
A、床沙
B、泥沙
C、推移质
D、悬移质
