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【单选题】
老年人综合健康评估包括（）A.
体能测定和心理测试
B.
身体、心理和社会交往
C.
患慢性病的种类、体能测定和心理测试
D.
患慢性病的严重程度、体能测定和心理测试
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举一反三
【单选题】When moist air moves over a cooler surface, then may occur.
A.
frontal fog
B.
steam fog
C.
advection fog
D.
radiation fog
【单选题】【单选】When moist moves over a cooler surface, then _____ may occur.
A.
advection fog
B.
radiation fog
C.
frontal fog
D.
steam fog
【单选题】Most of us have come to realize that it is about time (that) we ______ effective measures to prevent all kinds of pollution.
A.
take
B.
took
C.
must take
D.
shall take
【单选题】People begin to know that most environmental problems exist because necessary measures for preventing them _____ taken in the past. [ ]
A.
are not
B.
were not
C.
hadn't been
D.
wouldn't be
【简答题】某化学兴趣小组利用以下装置探究氯气与氨气之间的反应．其中A、F分别为氨气和氯气的发生装置，C为纯净干燥的氯气与氨气发生反应的装置． 请回答下列问题： （1）装置A中的固体物质不宜选用______（填字母编号）． a．无水氯化钙b．氢氧化钠c．氧化钙d．碱石灰e．无水硫酸铜 （2）写出装置F中发生反应的离子方程式：______；E装置的作用为______． （3）通入C装置的两根导管左边较长、右边较...
【单选题】When moisture air moves over a cooler surface, then may occur.
A.
advection fog
B.
radiation fog
C.
frontal fog
D.
steam fog
【单选题】Most(75)measures involve data encryption and password.
A.
security
B.
hardware
C.
display
D.
program
【单选题】Most environmental problems exist because adequate measures for preventing them ______ taken in the past.
A.
was not
B.
were not being
C.
were not
D.
was no to be
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