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【多选题】
下列结构中,属于桥梁五大部件的有()
A.
上部结构
B.
支座系统
C.
桥墩
D.
墩台基础
E.
桥面铺装
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举一反三
【单选题】构图主要解决花色冷盘的形体、结构和 ( )等问题。
A.
色彩
B.
层次
C.
规格
【单选题】酸洗制绒最常采用的酸洗溶液是( )。
A.
HCl+HF
B.
HCl+HNO3
C.
HF+HNO3
D.
HF
【简答题】()主要包括办公场地的租金、工作人员的工资、各种设备折旧,以及网购平台的相关固定费用,如淘宝店信誉达到钻石登记后,若选择专业版店铺装修,则需每月交纳一定费用。
【单选题】He ________ the naughty children and they kept silent at once. [     ]
A.
glared at
B.
stared at
C.
looked at
D.
glance at
【单选题】When ______ how old he was, he kept silent.
A.
asking
B.
asked
C.
to be asked
D.
ask
【单选题】When _________ where he had put the book, he kept silent.
A.
ask
B.
asking
C.
to ask
D.
asked
【单选题】下列说法中正确的是 (    )
A.
乙醇和乙二醇属于同系物
B.
将苯加入溴水中,溴水褪色,是因为发生了加成反应
C.
分子式为C 3 H 8 与C 6 H 14 的两种有机物一定互为同系物
D.
1-丁烯存在顺反异构体
【简答题】He kept silent over the matter because he had no intention to risk ______ in it. [     ] A .  to involve B.  being involved C .  to be involved D.  involving
【简答题】图像按照空间坐标的连续性可分为()和()
【单选题】In the lecture, little Tom kept silent all the time unless _________ to express his opinion.
A.
he invited
B.
he is invited
C.
invited
D.
being invited
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