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【单选题】
普通病室最适宜的温度和相对湿度是
A.
12~14℃,20%~30%
B.
14~16℃,25%~35%
C.
16~18℃,35%~45%
D.
18~22℃,50%~60%
E.
20~22℃,65%~75%
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举一反三
【单选题】Mike failed to finish his homework on time, so he tried to avoid _______ his teacher.
A.
meet
B.
to meet
C.
to meeting
D.
meeting
【简答题】A.He made a sudden turn. B.He tried to avoid hitting the truck. C.He was pursued by the running dog. D.A girl riding a bike crashed into his car.
【单选题】He tried to avoid ______ my questions in class.
A.
to answer
B.
answering
C.
having answered
D.
to have answered
【单选题】已知一个正四棱锥,棱锥的底面边长为 2 ,棱锥的高为 ,则正四棱锥的侧面积为 ,表面积为 _______.
A.
8,12
B.
4,8
C.
4,12
D.
8,16
【简答题】如图,已知正四棱锥P-ABCD的底边长为6、侧棱长为5.求正四棱锥P-ABCD的体积和侧面积. A
【单选题】已知四棱锥 的底面是边长为6的正方形,侧棱 底面 ,且 ,则该四棱锥的体积是(  )
A.
288
B.
96
C.
48
D.
144
【单选题】已知正四棱锥 的侧棱长与底面边长都相等, 是 的中点, 则 所成的角的余弦值为
A.
B.
C.
【单选题】He tried to avoid________my questions in class.
A.
to answer
B.
answering
C.
to have answered
D.
having answered
【单选题】已知一个正四棱锥,棱锥的底面边长为 2 ,棱锥的高为 ,则正四棱锥的侧面积为 ,表面积为 _______.
A.
4,12
B.
4,8
C.
8,12
D.
8,16
【单选题】He tried to avoid the barrier to his carrying out the plan.
A.
root
B.
obstacle
C.
danger
D.
advantage
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