不定项选择

提高港口装卸效率的主要途径是集装化。

A．正确
B．错误

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单项选择题

已知有定义：String=I love，下面哪个表达式正确

A．s+="you"
B．char c=s[1]
C．int len=s.length
D．string len=s.toUppercase()

单项选择题

What should the reservationists say when they pick up the phone? A. Hello, welcome to our hotel! B. This is reservations, may I help you? C. Good morning, who are you? D. Hello, Who is speaking?

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