函数y=|sinx|的最小正周期是( ) A.π4 B.π C.π2 D.2π

题型:选择题

问题:

函数y=|sinx|的最小正周期是(  )
A.
π
4
B.πC.
π
2
D.2π
考点:任意角的三角函数
题型:选择题

期货价格的波动敏感性源于()。

A.期货价格的远期性、预期性

B.期货市场的高流动性、信息高效性

C.交易机制的灵活性

D.期货交易者的特殊性

题型:选择题

下列论述中,正确的是()。

A.在评估中如遇到在役设备的零件带有裂纹,则可判断此设备已丧失使用价值

B.机器零件的疲劳断裂过程,大致可分为微观裂纹扩展、宏观裂纹扩展、急剧裂纹扩展及断裂四个阶段

C.影响裂纹扩展的主要参数是应力强度因子幅度AK

D.在应力强度因子幅度较低时,加载频率对裂纹的疲劳扩展速度影响较大

题型:选择题

以下哪种车辆不受规定速度限制?()

A.工程救险车

B.叉车

C.厂内电瓶车

题型:选择题
Tom grows the nicest vegetables and fruits and the most beautiful flowers in the village. Plants grow in Tom’s garden all through the __1__ and they are much __2__.
Tom cuts some flowers for his sitting room table, eats some fruits and vegetables, but he __3__ most of them in the market. His vegetables, fruit and flowers are so __4__ and beautiful that they sold much more __5__ in the market than those of other villagers.
How does Tom grow these beautiful things? He is so __6__ that he just sits under his orange tree with his radio.
He __7__ the music all day.
That is quite true. Tom __8__ things in spring, summer, autumn and winter. After that he sits with his radio. And everything __9__. It is the music that does the work. Tom knows more clearly that music makes the biggest vegetables and the most beautiful flowers. Plants love __10__ as much as people.
小题1:
A.weekB.monthC.seasonD.year
小题2:
A.betterB.worseC.lessD.later
小题3:
A.buysB.sellsC.borrowsD.lends
小题4:
A.dearB.badC.bigD.small
小题5:
A.politelyB.quicklyC.slowlyD.carefully
小题6:
A.angryB.busyC.tiredD.lazy
小题7:
A.listens toB.hearsC.watchesD.speaks
小题8:
A.fillsB.plantsC.throwsD.makes
小题9:
A.doesB.moves C.growsD.plays
小题10:
A.workB.rainC.storiesD.music
题型:选择题

符合慢性阻塞性肺疾病诊断中关于接触危险因素描述的是()。

A.进行性加重(逐渐恶化)

B.通常在活动时加重

C.间断存在

D.职业粉尘和化学物质

E.COPD家族史

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