I, ________ , do not believe that the era of the pioneer is at an end; I only believe that the area for pioneering has changed.
A. for one's part
B. for one's good
C. for one
D. for oneself
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保证数据的完整性就是_______。
A. 保证因特网上传送的数据信息不被第三方监视
B. 保证因特网上传送的数据信息不被篡改
C. 保证电子商务交易各方的真实身份
D. 保证发送方不能低赖曾经发送过某数据信息
Many women still feel that they are being ________ by a male culture, particularly in the professional services sector.
A. held back
B. held forth
C. held on
D. held out
妊娠期龈炎患者龈袋冲洗常用的药物是
A. 碘酚
B. 碘甘油
C. 四环素
D. 含有青霉素的1%过氧化氢液
E. 1%过氧化氢液
关于口腔正常菌群,说法错误的一项是
A. 刺激宿主免疫系统
B. 营养功能
C. 作为生物屏障,抑制外源微生物
D. 一般对宿主无益,甚至有害
E. 维持口腔或全身微生物的生态平衡