新产品试制属于（）的生产类型。
A.成批生产
B.大批生产
C.单件生产
D.大量生产
参考答案：C
下列一组全为环节动物的是
①蚯蚓 ②蜈蚣 ③水蛭 ④沙蚕（ ）
A．①②③
B．①②④
C．①③④
D．②③④
-When you your homework?
-I had finished it before he back.[ ]
A. have, finished, came
B. have, finished, was coming
C. did, finish, came
D. did, finish, was coming
