【单选题】A user has discovered that even though they are using the latest version of the anti-virus software,the computer is still being infected by a virus. Which of the following is the BEST solution for thi...
C.
Update the virus signatures.
【单选题】在生物学研究中,常使用染色剂对生物结构或物质染色以便观察,下列有关叙述正确的是 [ ]
A.
使用溴麝香草酚蓝水溶液检测酵母菌无氧呼吸产生酒精,其颜色变化是蓝→绿→黄
B.
对细胞线粒体染色时用盐酸处理细胞有利于染色剂通过细胞膜,健那绿染色后的线粒体呈蓝紫色
C.
用酶解法处理某样液,再用双缩脲试剂检测有紫色反应,说明样液中有蛋白质,且该酶不是蛋白酶
【单选题】Even though most universities retain the royalties from faculty members inventions, the faculty members retain the royalties from books and articles they write. Therefore, faculty members should retai...
A.
Royalties from inventions are higher than royalties from educational software programs.
B.
Faculty members are more likely to produce educational software programs than inventions.
C.
Inventions bring more prestige to universities than do books and articles.
D.
In the experience of most universities, educational software programs are more marketable than are books and articles.
E.
In terms of the criteria used to award royalties, educational software programs are more nearly comparable to books and articles than to inventions.
【单选题】下列关于金属钠的叙述中,说法正确的是
D.
钠投入到 CuSO 4 溶液中会观察到钠表面析出红色的铜
【单选题】关于进行口罩气密性检查,下列叙述正确的说法是:
D.
双手捂住口罩呼吸气,观察感觉口罩有略微隆起或塌陷
【多选题】关于前瞻性和回顾性队列研究的叙述,说法正确的是
D.
回顾性队列研究的观察方向是“因”与“果”同时出现
【单选题】轴上点发出的光束形为 , (有/无)对称轴。 轴外点发出的光束形为 , (有/无)对称轴。
【多选题】有关累积发病率的叙述,说法正确的是()。