一名远视患者，远视力为0.1，先作主观验光，用+2.5DS的镜片后，远视力提高到1.

下列说法中用离子方程式或电离方程式表达正确的是                      （   ）

A．用食醋、淀粉碘化试液检验加碘盐中的碘：IO₃^-+5I^-+6H⁺=3I₂+3H₂O

B．KHSO₄熔融状态下电离：KHSO₄=K⁺+H⁺+SO₄^2-

C．Fe(NO₃)₂溶液中滴加少量稀盐酸：3Fe²⁺+NO₃^-+4H⁺=3Fe³⁺+NO↑+2H₂O

D．明矾溶液中滴加过量的Ba(OH)₂溶液：Al³⁺+4OH^-=AlO₂^-+2H₂O

Fill in the blanks with the given words in their proper forms. (用括号内所给单词的适当形式填空，

每空限填一词。)

1．We all know that Tom's mother is a very _________ business woman. (succeed)

2．A car accident happened in our street last night. _________, no one was injured. (luck)

3．My sister _________ fish in that market early every morning. (sales)

4．It's _________ for her to get school so late because she is always the first one to get to school. (usual)

5．Suddenly, we heard a big ________ in the next meeting hall. (argue)

6．In some maths tests, the students are allowed to use the _________ calculators. (electric)

油压调节阀阀体为一筒形零件，油泵来的高压油由（）进油口入阀，由（）出油口流出，阀头被一弹簧压在阀面上，弹簧的变形大小决定了调节后油压的大小。

A.端面、侧面

B.侧面、端面

C.端面、端面

D.侧面、侧面

煅后增强制酸止痛作用，用于胃痛吐酸的药物是（）

A.牡蛎

B.石决明

C.瓦楞子

D.蛤壳

E.珍珠母

在世界贸易组织第四届部长级会议上，会议 * * 手中的击锤一落，标志着中国复关和加入WTO的进程结束，为了这一时刻，我国进行了长达多少年的不懈努力？