对于篇幅短小或者内在联系密切的材料,适于采用_____,对于篇幅较长或者较难、内在联系不强的材料,适于采用_____。
— ___________________
— Once or twice a week.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧