液位测量仪表有（）。
A.玻璃管
B.浮球
C.压差
D.A、B、C
参考答案：B
— What did Mr. Wang say just now?
— He _____ us not to play computer games all day. [ ]
A. tells
B. told
C. to tell
D. telling
目前N1001.0支持的操作系统有（）
A、WINDOWS NT
B、HP-UNIX
C、SOLARIS
