脲酶抑制剂 urease inhibitor

ACE inhibitors are not recommended__________. 查看材料

A.that may cause our blood vessels to become more and more narrow

B.for pregnant women to take during their last six months of pregnancies

C.that their likelihood to suffer major problems is two times higher than other babies

D.with their doctors about how to treat their problems

E.because diabetes during pregnancy may sometimes lead to birth defects

F.though their mothers took ACE inhibitors durin~ their first three months of pregnancies

Some of the most commonly used medicines for high blood pressure are drugs called ACE inhibitors .Doctors have given these drugs to patients for twenty-five years．A government study in the United States found that the use almost doubled betweenl995 and 2000．

Doctors have known for years that women should not take ACE inhibitors during the last six months of pregnancy．The medicine can injure the baby．ACE inhibitors，though，have been considered safe when taken during the first three months．But a new study has found that women who take these drugs early in their pregnancy still increase the risk of birth disorders．The study shows that compared to others，their babies were almost three times as likely to be born with major problems．

These included problems with the formation of the brain and nervous system and holes in the heart．the researchers say they found no increased risk in women who took other blood pressure medicines during the first three months．Researchers at Vanderbilt University in Tennessee and Boston University did the study．The New England Journal of Medicine published the results．The researchers studied the records of almost thirty thousand births between 1985 and 2000．Two hundred nine babies were born to women who took ACE inhibitors during the first three months of their pregnancies．Eighteen of the babies，or almost nine percent，had major disorders．

ACE inhibitors are often given to patients with diabetes．But diabetes during pregnancy can result in birth defects．So the study did not include any women known to be diabetic．ACE inhibitors sup．press a protein called angiotensin—converting enzyme，or ACE．This enzyme produces a chemical in the body that makes blood passages narrow．The drugs increase the flow of blood so pressure is reduced．

New drugs are tested on pregnant animals to see if they might cause birth defects in humans．But experts say these tests are not always dependable．The United States Food and Drug Administration helped pay for the study．The F．D．A．says women who might become pregnant should talk with their doctor about other ways to treat blood pressure．

第 33 题 Paragraph 2_______

Pregnant Women Warned About ACE Inhibitor

Some of the most commonly used medicines for high blood pressure are drugs called ACE in-hibitors. Doctors have given these drugs to patients for twenty-flve years. A government study in the United States found that the use almost doubled between 1995 and 2000.

Doctors have known for years that women should not take ACE inhibitors during the last six months of pregnancy. The medicine can injure the baby. ACE inhibitors, though, have been con-sidered safe when taken during the first three months. But a new study has found that women who take these drugs early in their pregnancy still increase the risk of birth disorders. The study shows that, compared to others, their babies were almost three times as likely to be born with major problems. These included problems with the formation of the brain and nervous system and holes in the heart.

The researchers say they found no increased risk in women who took other blood pressure medicines during the first three months. Researchers at Vanderbilt University in Tennessee and Boston University did the study. The New England Journal of Medicine published the results. The researchers studied the records of almost thirty thousand births between 1985 and 2000. Two hundred nine babies were born to women who took ACE inhibitors during the first three months of their pregnancies. Eighteen of the babies, or almost nine percent, had major disorders.

ACE inhibitors are often given to patients with diabetes. But diabetes during pregnancy can result in birth defects. So the study did not include any women known to be diabetic. ACE inhibitors suppress a protein called angiotensin-converting enzyme or ACE. This enzyme produces a chemical in the body that makes blood passages narrow. The drugs increase the flow of blood so pressure is reduced.

New drugs are tested on pregnant animals to see if they might cause birth defects in humans.But experts say these tests are not always dependable. The United States Food and Drug Adminis-tration helped pay for the study. The F. D. A. says women who might become pregnant should talk with their doctor about other ways to treat high blood pressure.

Paragraph 2 __________ 查看材料

A.Effects of ACE and ACE Inhibitors

B.Wide Use of ACE Inhibitors

C.How to Deal with High Blood Pressure in Pregnant Women

D.Damage to Pregnant Women"s Future Babies

E.Suggestions on Stopping the Use of ACE Inhibitors

F.Relative Safety for Women During the First Three Months of Pregnancies

A、Vmax decreases, Km decreases

B、Vmax increases, Km increases

C、Vmax remains unchange, Km increases

D、Vmax remains unchange, Km decreases

E、Vmax decreases, Km increases

A. PDE inhibitor

B. ACE inhibitor

C. HMG-CoA reductase inhibitor

D. Calcium antagonist

E. NO synthase

A．Call Directory Assistance.

B．Know the area code.

C．Call the operator.

D．Talk to a computer.

Many researchers believe that the presence of RNA in brain cells is the biochemical basis of memory; that is, the presence of RNA enables us to remember. Because certain chemicals are known to inhibit the synthesis of RNA in the body, we can test this hypothesis. Animals that have learned particular responses can be injected with an RNA inhibitor and then tested for memory of the learned responses. Which of the following test results would most seriously weaken the case for RNA as the basis of memory？

A．After an injection of RNA inhibitor, a wide range of behaviors in addition to the learned responses were affected.

B．After an injection of RNA inhibitor, animals that had not consistently been giving the learned responses were able to give them consistently.

C．After injections of RNA inhibitor, some animals lost memory of the learned responses totally but others lost it only partially.

D．After a small injection of RNA inhibitor, animals responded well, but as the size of the injection increased, they gave fewer of the learned responses.

E．After an injection of RNA inhibitor, animals could not learn a new response.

A．producing automobiles

B．to manufacture automobiles

C．in the production of automobiles

D．for automobiles producing