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【简答题】
坐轮椅时最好多长时间更换姿势（ ）|卧床患者应多长时间翻身1次（ ） A. 1小时 B. 2小时 C. 半小时 D. 3小时 E. 4小时
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举一反三
【单选题】When people talk about the most popular new Chinese Internet words, the first _________ comes into their mind is “hold up”.
A.
one
B.
of them
C.
which
D.
that
【单选题】W hat does the passage mainly talk about?
A.
Art is influenced only by the customs and faith of a people.
B.
Europe has followed a similar way of life for a very long time.
C.
T here are quite a few different styles of western art.
D.
T he style of western art has unchanged many times, while Chinese art has changed many times .
【单选题】I hear people talk about “Wisdom of the printed page”. They wonder .
A.
whether can the young afford to read books
B.
where do the Chinese people like to read books
C.
when the Chinese can realize the importance of reading
D.
why do Chinese people spend lots of their time playing mobiles
【单选题】如果用“灯光明暗法”而出现灯光旋转，用“灯光旋转法”而现了灯光明暗，这可能是 。
A.
待并机与电网的电压差太大
B.
待并机的频率高出电网太多
C.
待并机与电网的相序联接错误
D.
待并机与电网的相位差太大
【单选题】如果用“灯光明暗法”而出现灯光旋转，用“灯光旋转法”而现了灯光明暗，这可能是（）。
A.
待并机与电网的电压差太大
B.
待并机的频率高出电网太多
C.
待并机与电网的相序连接错误
D.
待并机与电网的相位差太大
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