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【单选题】
The part of a fuse that melts and opens the circuit is made of _____.
A.
copper and antimony
B.
steel and babbitt
C.
aluminum or beryllium alloy
D.
zinc or an alloy of tin and lead
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参考答案:
举一反三
【单选题】Which of the following statements is correct?
A.
The definition phase results in the Software Requirements Specification.
B.
Testing is optional in software life cycle.
C.
CASE tools can only aid in the design phase of a software life cycle.
D.
A change during a later phase does not require the documentation of all earlier phases to be updated.
【单选题】户外活动时,明明扭伤了脚,下列错误的处理方法 ( )。
A.
24 小时内用冰块或冷水毛巾反复多 次冷敷 (20~30min,检查皮肤的温度,间隔 10~20min)
B.
24-48 小时后热敷/活络油,促进血液循环
C.
怀疑骨折应去医院检查
D.
揉按受伤部位
【单选题】挥发油经薄层色谱展开后,喷洒2%高锰酸钾水溶液,在粉红色背景上产生黄色斑点表明含有()
A.
过氧基
B.
不饱和化合物
C.
饱和烃类
D.
酯类
【简答题】Mr Clark was born in a small town of England. When he finished middle school, he found work in the police station and he has worked there 42 years and he'll retire(退休)this autumn. He tried to work har...
【单选题】户外活动时,明明扭伤了脚,下列错误的处理方法( )。
A.
24小时内用冰块或冷水毛巾反复多次冷敷20~30min,
B.
立即停止运动
C.
24-48小时后热敷/涂活络油,促进血液循环
D.
揉按受伤部位,怀疑骨折应去医院检查
【简答题】食品中亚硝胺类化合物是怎样产生的?如何预防?
【单选题】Operations ( ) is a document that describes in detail the processes that users operate the softwar。
A.
Paper
B.
Book
C.
Menu
D.
Manual
【单选题】户外活动时,明明扭伤了脚,下列错误的处理方法( )。
A.
24小时内用冰块或冷水毛巾反复多次冷敷(20~30min,检查皮肤的温度,间隔10~20min)
B.
怀疑骨折应去医院检查
C.
揉按受伤部位
D.
24-48小时后热敷/活络油,促进血液循环
【单选题】He hurried to the school only _______ the campus was empty ___ it was Sunday!.
A.
find; because
B.
found; because of
C.
to find; because of
D.
to find; because
【单选题】打开word文档时指_______
A.
把文档从外存读取到内存并显示在屏幕上
B.
打开一个空白的文档窗口
C.
把文档从外存直接读取到显示器上
D.
打印文档的内容
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