What did the scientists do to find out if the e-nose worked?
A. They presented it with all common crops..
B. They fixed 13 sensors inside the device.
C. They collected different damaged leaves.
D. They made tests on damaged and healthy leaves.
第1题:
A、what, to do
B、what, to do it
C、which, 不填
D、that, 不填
第2题:
A. is
B. are
C. will
D. did
第3题:
第4题:
A. is, say
B. is, said
C. did, say
D. does, say
第5题:
What( )wrong with you
A.is
B.are
C.have
D.did
第6题:
You look() What()you()?
Atire;did;do
Btiring;have;done
Ctired;do;do
Dtired;have;been doing