In fact fresh air is very ( ) to our health.
A. grateful
B. beneficial
C. worthy
D. potential
In fact fresh air is very ( ) to our health.
A. grateful
B. beneficial
C. worthy
D. potential
[主观题]______ (run) is good for our health.
I find this treatment very ____________ to my health.( )A. advisableB. invaluabl
The chemicals in the vegetables and fruit are bad__________ our health.( )A. fro
[问答题]Chatting on the Internet is not only wasting time, but also doing harm to o
trees have been planted near here,so the air is very fresh.( )A. Two hundredsB.
Nowadays it is a well-known fact that second hand smoking does even more harm to
[单选题]There is no [risk]to public health.A.pointB.dangerC.chanceD.hope
[单选题]A charge of fresh air is drawn into the engine cylinder and then () by the moving piston() very high pressure.A . pressed;toB . pressurized;withC . pushed;inD . compressed;to
1. As teachers, we need to take (responsible)_ for looking after our students he
[单选题]The fresh air coming in through the inner air ports, is compressed by() to a higher pressure.A . the cylinder headB . the cross-headC . the moving pistonD . the stationary pisto