【单选题】疲劳裂纹最易在材料的什么部位产生( )。
【单选题】患者男,30岁。胸痛、咳嗽并伴低热及盗汗2个月,拟诊肺结核,最可靠的微生物学检查方法是
【多选题】以下选项哪些是“PEDIT”多线编辑命令中的( )
【单选题】具有软坚泻下作用的药物是(2011 真题下55)
【单选题】The underlined sentence 'Anything that is small enough for my pants pocket is living on borrowed time' indicates that ______.
A.
pocketed things can survive for a long lime
B.
things which can be put into pockets are easy to lose
C.
pocketed things are as precious as borrowed ones
D.
smaller things overweigh larger ones
【简答题】在二维表中,元组的——不能再分成为更小的数据项