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【单选题】
胎儿期体重增长快的阶段是( )A.
妊娠早期4
B.
妊娠早期12
C.
妊娠中期10
D.
妊娠中期15
E.
妊娠晚期13
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【单选题】Sometimes the biggest changes in society are the hardest to spot precisely because they are hiding in plain sight. It could well be that way with wireless communications. Something that people think o...
A.
social changes are complex in nature
B.
people may ignore wireless communications changes
C.
nomadism is nothing new in society
D.
everybody can work outside their offices
【简答题】By the time you get back, great changes __________in this area. A．will take place B. are taking place C. will have taken place D. are to take place
【单选题】十八大报告中提出我们要关注生态文明，建设美丽中国，但当前我国的污染问题仍然十分严重，特别是空气污染更是引人关注。近几年，我国的雾霾污染非常严重，2013年以来，我们四分之一国土出现雾霾，受影响人口约6亿人。雾霾中的PM2.5成为最新的健康杀手。我国不少地区把雾霾天气作为一种灾害性天气预警预报。下列关于雾霾的有关说法或治理措施科学的是（）
A.
出门戴好口罩，做好防护措施，就不怕雾霾天气对人体产生伤害
B.
“调整工业结构、能源结构”是控制污染的有效途径
C.
研制可降解塑料，可以有效控制“PM2.5”出现
D.
焚烧垃圾，减少固体废弃物，做好垃圾分类，能有效防止“雾霾天气”出现
【单选题】Light bulb which was invented by Edison _________now. [ ]
A.
was widely used
B.
is widely used
C.
will be widely used
D.
used widely
【单选题】Mobile phone is _____ used by many people _____ a communication tool. [ ]
A.
widely; for
B.
widely; as
C.
wide; as
D.
wide; for
【简答题】It is a language widely used in the world.
【单选题】In the past few years there _ great changes in my hometown. [ ]
A.
have been
B.
were
C.
had been
D.
are
【简答题】Why could not ceramics be used widely in the past?
【单选题】Why has growing population of young people caused the changes in museums?
A.
Because they are better educated.
B.
Because they have less spare time.
C.
Because they are stronger.
D.
Because there are more young people.
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