5.These instruments should be turned on and checked before we start our work. (switch on)
5.These instruments should be turned on and checked before we start our work. (switch on)
5.These instruments should be turned on and checked before we start our work. (switch on)
第1题
A.Trumpet and Drums
B.Guitar and Piano
C.Drums and Saxophone
D.Trumpet and Saxophone
第2题
A.in common
B.by common
C.under common
D.among common
第3题
B.are as good or better than the new one
C.is as good as or better than those of the new one
D.are as good as or better than those of the new one
第4题
According to the writer, the exactness of a science is partly related to ______.
A.the skill of the scientist
B.the extent to which variables can be controlled
C.the requirements of the observer
D.the development of more accurate instruments
第5题
From the passage we know that joints and muscles perform. best when ______ .
A.they are twisted and stretched
B.they are in their normal positions
C.they are tested with a human "guinea pig"
D.they are tested with electronic instruments