题目内容：
We can use cell phones to communicate with others when we encounter _______.
参考答案：
答案解析：
单选题：We can use cell phones to communicate with others when we en
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Natural gas is recognized as the most economical energy sour
Natural gas is recognized as the most economical energy source ____________
简述杂货班轮货运程序。
简述杂货班轮货运程序。
San Francisco is fully prepared for another big earthquake.A
San Francisco is fully prepared for another big earthquake.A. Right B. Wrong C.
根据下列材料请回答题：The San Francisco area is located above several a
根据下列材料请回答题：The San Francisco area is located above several active fault lines.A.
What's the author's view about flattery?
What's the author's view about flattery?