A.fashionable cotton blue
B.blue cotton fashionable
C.cotton fashionable blue
D.fashionable blue cotton

A.the more confident
B.the most confident
C.the greater confidence
D.the more confidently

A.was it difficult for Henry Jones
B.Henry Jones found it difficult
C.did Henry Jones found difficult
D.it was found by Henry Jones difficult

A.with
B.on
C.at
D.of

A.Had you paid enough attention, you wouldn't have asked such a question now.
B.Had it not been for your attention, you wouldn't ask such a question now.
C.Had you not paid enough attention, you wouldn't ask such a question now.
D.Had it not been for your inattention, you wouldn't ask such a question now.

A.Had you paid enough attention, you wouldn't have asked such a question now.
B.Had it not been for your attention, you wouldn't ask such a question now.
C.Had you not paid enough attention, you wouldn't ask such a question now.
D.Had it not been for your inattention, you wouldn't ask such a question now.

A.success
B.access
C.problem
D.culture

A.cùng pha.
B.lệch pha \(\dfrac{\pi }{3}\).
C.vuông pha.
D.ngược pha.

A.1 m/s.
B.0,25 m/s.
C.2,5 m/s.
D.0,1 m/s.

A.proton.
B.photon.
C.electron.
D.notron.