单项选择题

Why were cracks in old houses not a big concern

A．Because indoor cleanliness was not emphasized.
B．Because energy used to be inexpensive.
C．Because environmental protection was given top priority.
D．Because they were technically unavoidabl

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热门试题

单项选择题

In the eyes of the author, a successful engineering student is expected ______.

A．to have an excellent academic record
B．to be wise and mature
C．to be imaginative with a value system to guide him
D．to be a technical genius with a wide vision

单项选择题

The word they in ... together they threaten to confuse. (Line 3, Para 5) refers to ______.

A．engineering and the liberal arts
B．reality and noble ideals
C．flexibility and a value system
D．practicality and rationality