妊娠小便淋痛的发病机理，主要是膀胱气化失司，水道不利。导致气化失司，水道不利的原因是

根据短文内容，判断正（T）误（F） 。

     Did you see a  l, 000-pound pumpkin? Have you seen a big pumpkin like that? Howard Dill did.

He is a world famous pumpkin grower. Most pumpkins weigh from 15 t0 30 pounds, but Howard Dill

has bigger pumpkins and they weigh much more. Every year, he meets other pumpkin growers from

across North America. They have competitions to see who can grow the biggest pumpkin.

     People started to grow big pumpkins more than 100 years ago. About twenty years ago,Howard

Dill wanted to have a competition. He brought his biggest pumpkin to the competition.It weighed 438

pounds. Two years ago another pumpkin grower set a world record. His pumpkin weighed l,061

pounds!

( )l. Howard Dill is a world famous pumpkin grower.

(     )2. Most of Howard Dill's pumpkins weigh from 15 to 30 pounds.

(     )3. People started to grow big pumpkins about more than eighty years earlier than Howard did.

(     )4. Howard Dill grew the biggest world pumpkin and held the world record.

(     )5. Another grower's pumpkin was much lighter than Howard's.

若x=3是方程x²+2x-k=0的一个实数根，则k的值是______．

下列正确的叙述有（　　）

①CO₂、NO₂、P₂O₅均为酸性氧化物

②Ca（HCO₃）₂、Fe（OH）₃、FeCl₂均可由化合反应制得

③碘晶体分散到酒精中、饱和氯化铁溶液滴入沸水中所形成的分散系分别为：溶液、胶体

④灼热的炭与CO₂的反应、Ba（OH）₂•8H₂O与NH₄Cl的反应均既为氧化还原反应，又是吸热反应

⑤需要通电才可进行的有：电离、电解、电镀、电化学腐蚀

⑥氯化铝溶液与氢氧化铝胶体具有的共同性质是：能透过滤纸，加热蒸干、灼烧后都有氧化铝生成

⑦苛性钾、次氯酸、氯气按顺序分类依次为：强电解质、弱电解质和非电解质

⑧金属元素和非金属元素形成的化合物一定是离子化合物．

A．3个

B．4个

C．5个

D．6个

两份铝屑，第一份与足量稀盐酸反应，第二份与足量氢氧化钠溶液反应，产生的氢气的体积比为1∶2，则第一份与第二份铝屑的质量比为[ ]

A．1∶1

B．1∶2

C．1∶3

D．2∶1

强直性脊柱炎最常累及（）

A.脊柱

B.手关节

C.髋关节

D.骶髂关节

E.膝关节