图是用显微镜观察人的血细胞涂片时所看到的图象，视野中标号①指的是（ ）
A．白细胞
B．红细胞
C．血小板
D．淋巴细胞
答案：A
有偿服务中包含哪些费用（）。
A.劳务费
B.交通费
C.备件费
D.检测费
Was it from Mary, _______ was working at a department store, ______ you learned the news?
A．who; who
B．that; which
C．who; that
D．who; which
