SIMPLE PRESSURE GAUGES SUCH AS LIQUID-LEVEL MANOMETERS AR...

821. - De thi trac nghiem TOEIC tong hop
De thi trac nghiem TOEIC tong hop
821. simple pressure gauges such as liquid-level manometers are ... insensitive for use invacuum works.(A) too (B) so (C) than (D) enoughAnswer. 818. (B) 819. (C) 820. (C) 821. (A)