治疗咳嗽较弱的患者可选用的药物是（） A.可待因 B.苯丙哌林 C.喷托维林 D.羧

下列各项中，在跨膜运输时需要载体，但不需要能量的是[ ]

A．O₂进入组织细胞

B．红细胞吸收葡萄糖

C．小肠上皮细胞吸收葡萄糖

D．组织细胞排出Na⁺

改革开放以来，我国经济发展取得了巨大的进步。各个社会阶层都从这些发展成就中获得了切实的利益，极大地改善了人民群众的生活状况。从《政治生活》角度看．全体人民共享改革发展的成果说明了

A．我国人民民主的广泛性

B．我国人民民主注重经济发展，不重视政治发展

C．我国人民民主的真实性

D．我国人民民主不重视 * * ，只重视生存权

阅读理解。

     Matt and his wife lived in the country. Matt was very mean and hated spending money. One day a

fair(交易会)came to the nearby town.

     They went to the fair and looked at all the things to buy. Matt's wife wanted to buy a hat only costing $28, but was refused. Later on, a comb of $5 attracted her attention, but he would not let her spend any

money.

    Then, in a nearby field, they saw a small airplane. "Fun flight!" the notice said, "$10 for 10 minutes."

     Matt had never been in an airplane and he wanted to go on a fun flight. However, he didn't want to

pay for his wife either. "I've only got $10," he told the pilot. "Can my wife come with me for free?" The

pilot wasn't selling many tickets, so he said, "I'll make a bargain with you. If your wife doesn't scream,

she can have a free flight."

      Matt agreed, and got into the small airplane with his wife. The pilot took off and made his airplane do

all kinds of things. At one moment it was flying upside down.

      When the plane landed, the pilot said, "OK, your wife didn't make a sound. She can have her ride

free."

      "Thank you," Matt said, "it wasn't easy for her, you know, especially when she fell out."

1. How much did the couple spend at the fair?

A. $28.        

B. $5.    

C. $43.

D. $10.

2. The pilot flew the airplane upside down in order to _______.

A. throw the wife out of the plane      

B. get another $10 by making the wife shout

C. show off his perfect flying skills

D. provide the couple with pleasure of excitement

3. The passage is intended to _______.

A. teach readers a lesson  

B. attract tourists  

C. make readers laugh  

D. praise the couple

4. What can we infer from the passage?

A. Matt loved money more than his wife.  

B. Matt would like to buy everything for his wife.

C. The pilot didn't mind whether Matt's wife would pay.

D. Matt's wife enjoyed her riding in the plane.

大位移定向井钻井液体系选择必须性能稳定周期长、（）、配伍性好、易调整、适应所钻地层的原则。

A.密度高

B.抗Ca²⁺污染

C.抗污染能力强

D.抗水泥污染

稀释浓硫酸时，为何不准将水倒入浓硫酸中？