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【单选题】
一个卤素灯的额定电压为U=12V,螺旋形灯丝的电阻为2.4欧姆,则流经螺旋形灯丝的电流为多大?A.
10A
B.
5A
C.
3A
D.
1A
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【简答题】阅读下列说明，回答问题1至问题4，将解答填入答题纸的对应栏内。 [说明] 某单位信息化工程项目主要包括机房建设、综合布线、硬件系统集成和应用软件系统开发。建设单位通过公开招标选择了承建单位和监理单位。在项目建设过程中，发生了如下事件: [事件1] 建设单位要求承建单位分析项目建设有可能出现的主要质量风险因素并给出对应的监理质量控制措施。承建单位经过充分的分析和论证得出了项目主要的质量控制风险因素，...
【单选题】—What do you usually do on Sunday? —I usually volunteer at an animal hospital the animals.
A.
take risks
B.
to take risks
C.
look after
D.
to look after
【单选题】—What’s your favorite ? —Animal World. I watch it on TV every day.
A.
animal
B.
subject
C.
program
D.
book
【单选题】—What does this modern-day dinosaur look like? —The tongue of this animal can be extended _____ of its body.
A.
more than twice the length
B.
twice more than the length
C.
more than the length twice
D.
more twice than the length
【单选题】设函数【图片】在点【图片】有偏导数【图片】和【图片】，则【图片】是【图片】在点【图片】有极值的【图片】
A.
必要而非充分条件
B.
充分而非必要条件
C.
充分必要条件
D.
既非充分条件又非必要分条件
【简答题】What kind of animal is the coyote described as?
【单选题】What aspect of animal experimentation does the professor mainly discuss?
A.
How harmful it is to animal protection.
B.
How useless it is for the medical care.
C.
How its development differs from that of others,
D.
How it develops from an early ag
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