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【单选题】
静态RAM是采用________存储信息，信息读出后，仍能保持原状态，不需要再生。动态RAM是采用________存储信息，每隔一定时间，需对所有存储单元进行刷新。A.
电容存储电荷的原理；触发器工作原理
B.
电容存储电荷的原理；锁存器工作原理
C.
触发器工作原理；电容存储电荷的原理
D.
锁存器工作原理；电容存储电荷的原理
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皮皮学刷刷变学霸
举一反三
【判断题】Well-designed pre-reading activities should help the students better understand the text they are going to read.
A.
正确
B.
错误
【单选题】How is virtual reality surgery performed?
A.
It is performed by a computer-designed high precision device.
B.
Surgeons wear virtual reality helmets to receive feedback provided by a computer.
C.
Surgeons move robotic instruments by means of a computer linked to them
D.
A 3-D image records the movements of the surgeons during the operation.
【单选题】关于煮沸灭菌，下列哪项说法不当
A.
持续煮沸20分钟可杀灭一般细菌
B.
要杀灭带芽孢的细菌需持续煮沸1小时
C.
一般压力锅的最高温度可达124℃
D.
水中加入碳酸氢钠是因为碱性化学作用有助于杀灭细菌
E.
在2%碳酸氢钠溶液中煮沸灭菌有防止金属器械生锈的作用
【单选题】关于煮沸灭菌，下列哪项说法不当
A.
持续煮沸20分钟可杀灭一般细菌
B.
要杀灭带芽胞的细菌需持续煮沸1小时
C.
一般压力锅的最高温度可达124℃
D.
水中加入碳酸氢钠是因为碱性化学作用有助于杀灭细菌
E.
在2%碳酸氢钠溶液中煮沸灭菌有防止金属器械生锈的作用
【单选题】一Who designed this game? 一It by Tom in 1999. [ ]
A.
is designed
B.
designs
C.
was designed
D.
designed
【单选题】Choose the true statement regarding QoS pre-classify.（）
A.
QoS pre-classify permits making QoS decisions based on elements from the unencrypted IP packet.
B.
QoS pre-classify is required when encrypting voice.
C.
QoS pre-classify is an advantage to Service Providers transporting encrypted packets.
D.
QoS pre-classify is not designed for IPSec/GRE configurations.
【单选题】关于煮沸灭菌,下列哪项说法不当
A.
持续煮沸 15 分钟可杀灭一般细菌
B.
要杀灭带芽孢的细菌需持续煮沸 1 小时
C.
一般压力锅的最高温度可达 124℃
D.
水中加入碳酸氢钠是因为碱性化学作用有助于杀灭细菌
E.
在 2 ％碳酸氢钠溶液中煮沸灭菌有防止金属器械生锈的作用
【单选题】The training course to introduce you to the security check at the Airport. A) designs B) be designed C) designed D) is designed
A.
designs
B.
be designed
C.
designed
D.
is designed
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