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【多选题】
引起文化休克的原因?A.
语言沟通障碍
B.
日常生活差异
C.
饮食习惯不同
D.
态度与信仰不同
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Why does the professor mention fossils?
A.
To describe the evidence Wegener used to develop his theory.
B.
To suggest that Wegener borrowed ideas from earlier scientists.
C.
To explain how Wegener first became interested in geology.
D.
To show why most scientists ridiculed Wegener's theory.
【单选题】Agriculture was a step in human progress ______ which subsequently there was not anything comparable until our own machine age.
A.
to
B.
for
C.
in
D.
from
【简答题】读卡器是一种输入设备。（ ）
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