根据监管规定，收单机构不得发展以下哪几类商户？（） A.非法设立的 B.从事非法经营

下列粒子半径最小的是（　　）

A．Na⁺

B．Na

C．Cl

D．Cl^-

每次用药后必须漱口以减少鹅口疮与声音嘶哑不良反应的发生率的药物是（）

A．合并冠心病者 

B．合并有脑卒中的患者 

C．老年人收缩期高血压者 

D．对伴有脂质代谢异常的患者 

E．伴妊娠者

用于消毒口腔及创口的洗必泰液浓度为（）

A.0.1%

B.0.5%

C.1%

D.2%

E.3%

Americans use more water than any other people in the world. If we continue to use water at the rate we do now, we will soon not have enough to meet our needs. In 1980, 40 billion gallons were used each day in the United States. In 1990, 700 billion gallons were used. The average Americans uses almost 90 gallons of water a day for personal use. And much move water is needed to make the things American people like to have. For example, it takes thousands of gallons of water to make one pound of beef for the dinner table. It takes more than 100,000 gallons of water to make a car. If we include these uses of water, the average American uses about 2000 gallons of water a day.

It takes ______ water to make a car than to make one pound beef.

A．much

B．more

C．less

D．fewer

土地权利构成了公民（）的最后堡垒。

A.自立

B.自强

C.自决

D.自由