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【单选题】
《如何解题》、《数学发现》的作者是（）。A.
庞加莱
B.
弗赖登塔尔
C.
波利亚
D.
克莱因
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】This silk scarf is the perfect ________ for stylish summer evenings.
A.
accessory
B.
logo
C.
category
D.
display
【单选题】语法单选 10. This kind of scarf is made of silk. It so soft.
A.
looks
B.
seems
C.
smells
D.
feels
【单选题】This scarf is our bestseller. It is made _____first-class silk.
A.
from
B.
of
C.
in
D.
with
【单选题】This silk scarf is made in Suzhou. It feels just as as it looks.
A.
beautiful
B.
beautifully
C.
good
D.
well
【简答题】设计重级工作制焊接吊车梁时应选用何种钢材?应保证哪些力学性能指标?
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