Itisessentialthatyou__________anydocumentcarefullybeforesigningit.
A、read
B、reading
C、canread
D、haveread
A、频率不同的光一定不能相互干涉
B、频率不同的光一定能够相互干涉
C、频率相同的光一定不能相互干涉
D、频率相同的光一定能够相互干涉
Idon’tneedanyhelpatthemoment,butI_____youroffer
A、appreciate
B、admire
C、enjoy
D、like
Let’spersonalfeelingsinmakingjudgment.()
A、setoff
B、setaside
C、setback
D、setup