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【单选题】
下列天然纤维中属于长纤维的是( )
A.
棉纤维
B.
桑蚕丝
C.
麻纤维
D.
羊毛
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参考答案:
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【简答题】根据以下材料回答第 1~4 题: Passage Three How can we get rid garbage?Do we have enough energy sources to meet our future energy needs? These are two important questions that many people are asking today.Some peo...
【简答题】铁路信号分为哪几类?基本颜色的含义是什么?
【判断题】铁路信号按功能可分为视觉信号和听觉信号。
A.
正确
B.
错误
【简答题】How green are you? Do you know how to be green? We all need a healthy environment, but we produce waste every day and it does harm to our environment. Though we are young, we can still do something to...
【简答题】铁路信号按信号机具是否可以移动分为哪几类?
【单选题】关于儿童股骨头骨骺骨缺血坏死的Ⅹ线征象下列哪一项是错误的
A.
股骨头骨骺较小且扁
B.
股骨头骨骺密度增高
C.
股骨头骨骺增生
D.
早期出现明显关节间隙狭窄
E.
治疗准确及时者,死骨吸收消失,新骨出现,股骨头骨骺大小。密度及结构回复正常
【单选题】关于月经生理现象,下列哪项是错误的?
A.
月经第一次来潮,称为“初潮”。初潮年龄大约在14岁左右。
B.
正常月经量中,3~5/28~32天,量中等.色暗红,无凝块。
C.
月经来潮时,可伴有轻度腰疼、小腹发胀。
D.
绝经年龄多在50岁左右。
E.
月经来潮时,伴有衄血或吐血,并随月经周期而发作。
【单选题】同型号整流模块应具有并联运行,均分负载的能力,模块间的电流不平衡度应不大于输出电流额定值的( )。
A.
10%
B.
5%
C.
3%
D.
7%
【简答题】How do we produce a fine grain size in the ferrite and still use high rolling temperatures to form the austenite?
【单选题】What statement is NOT the author's answer to the question “How Do We Acquire Language”?
A.
We acquire our native language in a natural way.
B.
We are preprogrammed to process and produce our first language.
C.
Children don't always follow the exact stages presented in the studies of L1 acquisition.
D.
Infant babies are not able to pick out their native language from other sounds untile they are 10-month-old.
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