题目内容

In cold climates, the wood-frame dwelling, properly built and insulated, ______ warmest type of home.

A. and the
B. the
C. is the
D. where it is the

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三相电源绕组△联结时只能输出( )。

A. 相电压
B. 线电压和相电压
C. 线电压
D. 相线对地电压

女性患者，72岁，冠心病患者，1周前出现呼吸困难。查体：口唇发绀，双肺底可闻及湿啰音，肝大，双下肢水肿，该患者发绀属于

A. 肺性发绀
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C. 淤血性周围性发绀
D. 缺血性周围性发绀
E. 混合性发绀

When we get our tickets, ______ be marked "first class".

A. it is to
B. it will
C. they were to
D. they will

The children were (surprised) when the teacher (had) them (to) close their books (unexpectedly).

A. surprised
B. had
C. to
D. unexpectedly