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【单选题】
属于一级预防的措施是A.
培养健康生活方式
B.
自我检查
C.
爱护伤残教育
D.
早诊断
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举一反三
【单选题】According to paragraph 4, why do scholars believe that the spots on the horses may represent a hunting scene?
A.
Other cave paintings near this one include hunting scenes.
B.
The spots are made of rocks that were attached to the wall.
C.
The spots are painted outside the horses' forms as well as inside them.
D.
The primitive writing is interpreted as an accounting of a hunt.
【单选题】如图所示,在两个大小相等的力F 1 和F 2 的作用下,质量为m的木块可在两长板之间以v的速度匀速向下滑落,如果保持两力F 1 和F 2 的大小方向不变,能使木块m以3v的速度匀速向上滑动,那么木块向上的推力应是( )
A.
F 1 +F 2
B.
mg
C.
2mg
D.
3mg
【单选题】Who have taken part in discussions with the governor of Brazil Central Bank?
A.
Some representatives of the United States.
B.
The leaders of the countries which lent Brazil money.
C.
Representatives of the world's important commercial banks.
D.
Representatives of those countries which have to pay huge foreign debts.
【单选题】A salary increase would be entirely for merit. Increased ______in a business would represent real progress.
A.
deal
B.
transaction
C.
turnover
D.
quantity
【单选题】According to the passage, words are______.
A.
visual letters
B.
represented by sounds
C.
represented either by sounds or letters
D.
signs called letters
【单选题】Wang Feng’s _________ our school at the English speech contest proved to be a success.
A.
will represent
B.
to represent
C.
representing
D.
represented
【单选题】如图所示,某同学用压力 F压一质量为m的木块,使其始终静止在竖直墙面上。下列说法正确的是( )
A.
压力越大，木块受到的摩擦力越大
B.
墙面越粗糙，木块所受的摩擦力越大
C.
木块的质量越大，其受到的摩擦力越大
D.
木块始终静止的原因是推力与木块的重力是一对平衡力
【单选题】The style of Lady Gaga _________ a major trend (趋势；趋向) in fashion.
A.
entertains
B.
focuses
C.
represents
D.
handles
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