发明专利的保护期限为______。
A.10年
B.20年
C.30年
第2题
A.To indicate the emphasis teachers once placed on penmanship.
B.To criticize a technique used to motivate children.
C.To illustrate the benefits of competition.
D.To suggest that teachers be recognized for their efforts.
第3题
A.crisis
B.implications
C.impressions
D.emphasis
第6题
第7题
A.A)with
B.B) for
C.C) on
D.D) to
第8题
A、factuality
B、a nice surprise
C、comprehensive treatment
D、emotional appeal
第9题
work, the instructor will report your absences to the adviser.
(A) large (B) strong (C) hard (D) high
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