1931年11月在江西瑞金县成立的红色 * * 是（）
参考答案：中华苏维埃共和国临时中央政府
周期与某个脉冲中的循环周期数之积为（）。
A.脉冲重复频率
B.连续波
C.脉冲重复周期
D.脉冲宽度
We arrived at the small town too late, almost at midnight. We found there was no food ________ as all the shops were closed.
A．delicious
B．suitable
C．available
D．pleasant
