当路程s一定时,速度v与时间t之间的函数关系是[ ] A.正比例函数 B.反比例

题型:选择题

问题:

当路程s一定时,速度v与时间t之间的函数关系是[ ]

A.正比例函数

B.反比例函数

C.一次函数

D.无法确定

考点:反比例函数的定义
题型:选择题
My brother Jerry works at a clothes shop. He works very       hours every day. He usually       at six in the morning. Then he starts to       for ten minutes. He thinks running is       for his health. After that, he plays       for fifteen minutes. Then he has breakfast. After breakfast, he takes a bus to work. He is very busy. He has no time       home for lunch, so he eats       at the shop. In the afternoon, he        for four hours. He has dinner at home. On weekends, he is not so      . He usually goes to see a film       me.
小题1:
A.longB.bigC.shortD.small
小题2:
A.goes homeB.gets upC.goes to workD.eats breakfast
小题3:
A.speakB.swimC.singD.run
小题4:
A.happyB.goodC.fun D.difficult
小题5:
A.badminton B.the volleyball C.violin D.the basketball
小题6:
A.goB.goes C.going D.to go
小题7:
A.themB.himC.it D.us
小题8:
A.stands B.waitsC.works D.buys
小题9:
A.busy B.free C.happy D.tired
小题10:
A.at B.withC.for D.to
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人民调解制度作为人民群众自治的重要内容被载入宪法是在()年。

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硫化氢中毒的抢救措施中,不正确的是()

A.立即将患者移至空气新鲜处

B.有条件者立即行高压氧治疗

C.对躁动不安、高热昏迷者,可采用冬眠疗法

D.不宜应用糖皮质激素

E.可应用谷胱甘肽

题型:选择题

某兴趣小组同学将CO2分别通入澄清石灰水和氢氧化钠溶液中,观察到前者变浑浊,后者无明显现象.

(1)写出上述澄清石灰水变浑浊的化学方程式______.

(2)为探究CO2和NaOH是否发生了化学反应,王强设计了如图所示的A、B实验,验证CO2与NaOH溶液发生了化学反应.

试验现象为:A中试管内液面上升,B中______.李莉提出质疑,她认为A实验不严谨,应做一个对比实验是______.杨红认为也可以向B实验后的溶液中加入无色酚酞,若不变色,则证明NaOH与CO2发生了反应,可行吗?______(填“可行”、“不可行”),理由是______.

题型:选择题

利用兰花的离体组织大规模培育兰花属于_____________________________。

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