为体现天线在整个工作频段内的特性,国家标准规定必须至少测试频带中的()个频点进行测试。
A、10
B、8
C、5
D、3
参考答案:D
The second Sunday of May is ________ Mother’s Day. It’s ________ special day for children
to show their love for their mothers.
A.a;the
B.the;a
C.不填;a
D.不填;the
If we continue to be the problem, things are sure to go from bad to worse. [ ]
A. blind to
B. interested in
C. honest about
D. satisfied with (对….感到满意)