高频调谐功率放大器中,为了兼顾输出功率和效率,θ的取值范围一般取40°~70°。
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监理工程师李某在对某工程施工的监理过程中,发现该工程设计存在瑕疵,则李()
A. 以要求施工单位修改设计
B. 应当报告建设单位要求施工单位修改设计
C. 应当报告建设单位要求设计单位修改设计
D. 应当要求设计单位修改设计
金枪鱼肌肉中含有丰富的胡萝卜素。
A. 正确
B. 错误
Which statements are correct about temporary tables()
A. Indexes and views can be created on temporary tables.
Both the data and the structure of temporary tables can be exported.
C. Temporary tables are always created in a user’s temporary tablespace.
D. The data inserted into a temporary table in a session is available to other sessions.
E. Data manipulation language (DML) locks are never acquired on the data of temporary table