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【单选题】
为了兼顾输出功率和效率,丙类谐振高频功放的最佳导通角约为( ) 。A.
120°
B.
90°
C.
70°
D.
0°
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皮皮学刷刷变学霸
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【单选题】Our goal is to fulfill the needs of our clients, __ challenging they may be.
A.
however
B.
whenever
C.
wherever
D.
whatever
【单选题】______ for your help, We’d never have been able to get over the difficulties.
A.
Had it not
B.
Had it not been
C.
If it were not
D.
If we had not been
【简答题】所谓账务处理程序，是指会计凭证、会计账簿、会计报表相结合的方式，包括会计凭证和账簿的种类、格式，会计凭证与账簿之问的联系方法，由原始凭证到编制记账凭证、登记明细分类账和总分类账、编制会计报表的工作程序和方法等。（ ）
【单选题】We had a(n) ______ with him about this problem last night.
A.
explanation
B.
impression
C.
exhibition
D.
discussion
【单选题】______ for your help, we'd never have been able to get over the difficulties.
A.
If we had not been
B.
Were it not
C.
If it were not
D.
Had it not been
【简答题】Grandfather / old / in our village
【单选题】It is vital that you our competitors to know our plan.
A.
do not permit
B.
will not permit
C.
not permit
D.
have not permitted
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