【多选题】直梁弯曲时,横截面上一般要产生()两种内力。
【单选题】The famous singer and actress ___________ performing in our city this week.
【单选题】The teacher often encourages the students _______to their pen friends in English.
【简答题】儿童常见的结核为A.原发型肺结核 B.血行播散型肺结核 C.继发性肺结核病 D.结核性胸膜炎 E.肺外结核 成人常见的结核为A.原发型肺结核 B.血行播散型肺结核 C.继发性肺结核病 D.结核性胸膜炎 E.肺外结核
【简答题】Java程序的编译和执行模式包括( )和( )