—Don't forget to post the letter, will y

驱铅治疗的首选药物（）

A.亚硝酸钠

B.依地酸二钠钙

C.阿托品

D.美蓝

E.青霉胺

切削铸铁等脆性材料时，为了减小粉末状，需用切削液

In advertisement English, there is a tactful use of homophones — words that are pronounced alike but written differently and often have different meanings. This feature can be seen in ______.

A．I’m MORE satisfied. (cigarette)

B．The new computer from AT&T. Flexible. Reliable. And very compatible. (computer)

C．7 days without 7-up make one weak. (beverage)

D．Less is more. (car)

（）是学习语言文字运用的一种方法，也是考察思维与文字表达能力的一种手段。

下列矿物元素中属于微量矿物元素的是（）

A.镁

B.磷

C.铜

D.钾