急淋白血病（） A.细胞中含粗大嗜清颗粒比例≥30％ B.POX反应，非特异酯酶均阴

我国以食盐加碘方式防治碘缺乏病，碘盐就是在普通食盐中加入碘酸钾(KIO₃)。

(1)碘酸钾中碘元素(I)的质量分数是____。

(2)碘酸钾高温下容易分解，所以炒菜宜在起锅前才加食盐。有人认为高温下碘酸钾会首先分解为碘化钾，化学方程式是2KIO₃2KI+3O₂↑，该反应前后，碘元素的化合价是________（填“升高”、“降低”或“没变”）。

(3)日本地震造成了核泄漏，我国部分地区监测到了极微量的人工放射性核素碘-131，该碘原子的结构示意图为。碘元素的核电荷数是____；下列原子对应的元素与碘元素化学性质相似的是__。

Mr Smith had two sons.One was seven years old, and the other was five.One morning during the holiday, when Mr Smith was cleaning the car, his younger son came and asked him for some money for sweets.

‘Sweets are bad for your teeth,’ Mr Smith said.‘Take these two oranges instead, and give one to your brother.’

One orange was much bigger than the other, and as the small boy likes oranges very much, he kept the bigger one for himself, and gave his brother the smaller one.When the other boy saw that, he said, ’It’s selfish to take the bigger for yourself.If Father had given me the oranges, I’d have given you the bigger one.’

‘I know you would,’ answered his brother.‘That’s why I took it.’

小题1:What was Mr Smith doing one morning?

____________________________________________________________________

小题2:What did the younger boy ask for?

____________________________________________________________________

小题3:What did his father give him instead?

____________________________________________________________________

小题4:Who got the bigger orange?

____________________________________________________________________

小题5:Why did the elder boy say that his brother was selfish?

____________________________________________________________________

当前，我国已经形成了的新的就业方式 [ ]

①劳动部门介绍就业

②劳动者自主择业和自主创业互相结合、互相补充

③统筹分配，专业对口

④一次就业定终身

A．①②

B．③④

C．①③

D．②④

各种用电器都需要电能才能工作，通过学习我们知道：电能是由______转化而来的．比如家庭用的电能就是来自于______、______和______（填发电方式或能量转化，任选三个合理的答案）．