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【单选题】
下列抑制作用属于竞争性抑制作用的是( )。A.
磺胺类药物对细菌二氢叶酸合成酶的抑制作用
B.
敌敌畏对胆碱酯酶的抑制作用
C.
砷化物对巯基酶的抑制作用
D.
氰化物对细胞色素氧化酶的抑制作用
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举一反三
【单选题】According to the fifth paragraph, which of the following statements is NOT a fact?
A.
The successful collaboration among medicine, advanced technology, and telecommunications is likely to have enormous implications for patient care and doctor training.
B.
Highly skilled surgeons may perform. especially difficult operations through longdistance procedures.
C.
The scanning systems used to control surgical movement can also lead to a breakthrough in teaching surgical techniques to a new generation of physicians.
D.
More surgeons-in-training will have the opportunity to observe their teachers in action in telesurgery operating rooms around the world.
【单选题】词汇与结构 Proper clearing procedures, combined with proper visual_____techniques, are the most effective strategy for collision avoidance.
A.
skidding
B.
skimming
C.
scanning
D.
seeing
【简答题】1 二轴晶光率体为____________椭球体____、____、____分别代表光率体的长轴、中轴和短轴等三个主轴。它们相互_________,其长度分别代表二轴晶的_________。
【单选题】当在居住的楼房中遭遇火灾时,应采取正确有效的方法自救逃生,减少人身伤亡损失。下列做法中不正确的是
A.
打开门窗，以利于观察火情的发展
B.
不要盲目乱跑，更不要跳楼逃生
C.
紧闭门窗，隔断火路，等待救援；有条件的，可以不断向门窗上浇水降温，以延缓火势蔓延
【单选题】词汇与结构 Proper clearing procedures, ________ with proper visual scanning techniques, are the most effective strategy for collision avoidance.
A.
concerned
B.
content
C.
combined
D.
compared
【单选题】In a grocery store, a clerk uses a barcode scanner to read the barcode on an item. Which of the following components of an information system includes this scanning device?
A.
hardware
B.
software
C.
data
D.
procedures
【单选题】当在居住的楼房中遭遇火灾时，应采取正确有效的方法自救逃生，减少人身伤亡损失。下列做法中不正确的是
A.
打开门窗，以利于观察火情的发展
B.
不要盲目乱跑，更不要跳楼逃生
C.
紧闭门窗，隔断火路，等待救援；有条件的，可以不断向门窗上浇水降温，以延缓火势蔓延
D.
以上藐视都不正确。
相关题目：
【简答题】1 二轴晶光率体为____________椭球体____、____、____分别代表光率体的长轴、中轴和短轴等三个主轴。它们相互_________,其长度分别代表二轴晶的_________。