[填空题]We hope this unfortunate incident wil not afect the friendly relations（）us.

[填空题]We hope this unfortunate incident wil not afect the friendly relations（）us.

[填空题]We hope that you wil look（）the cause of the defective goods.

[填空题]As we are heavily committed,we are sorry that we are not in a（）to accept new orders.

[单项选择]可抑制Th0细胞向Th2细胞转化的是（）
A. IL-5
B. IL-4
C. IFN-γ
D. TNF-α
E. IL-8

[单项选择]Th1具有（）
A. 中和作用
B. 免疫调节作用
C. 传导活化信号作用
D. 趋化作用
E. 引起DTH作用

[单项选择]Th2细胞主要分泌（）
A. IFN-α
B. IL-4
C. IFN-γ
D. TNF-β
E. IL-2

[单项选择]Th1细胞分泌（）
A. IFN-γ
B. IL-4
C. IL-5
D. IL-6
E. IL-10

[填空题]The discipline that studies the rules governing the formation of words into permissible sentences in languages is called s（）

[单项选择]It is the news （）most parents of the hope that there is a safe and socially approved road to a kind of life they themselves have not had, but their children can．
A. that deprive　  
B. that it deprives 
C. that deprives　 
D. when it deprives

[单项选择]Th2细胞不分泌（）
A. IL-2
B. IL-5
C. IL-4
D. IL-10
E. IL-13

[单项选择]We（）some brochurs（）to illustratethe procucts we manufactured.
A. enclose,to you
B. enclose you,/
C. enclose,/
D. enclose,you

[单项选择]We all gather facts and （） conclusions, but we have very different styles of thinking.
A. pull
B. draw
C. take
D. receive

[单项选择]Th细胞的表面标志为（）
A. CD3
B. CD4
C. CD8
D. CD20
E. CD19

[单项选择]

The economy of the United states after 1952 was the econnomy of a well-fed,almost fully employed people. Despit occasional alarms, the country escaped any postwar depression and lived in a state of boom. A n economic survey of the year 1955, a typical year of the 1950’s, may be typical as illustrating the rapid economic growth of the decade. The national output was value at 10 percent above that of 1954 (1955 output was estimated at 392 billion dollars). The production of manufacturers was about 40 percent more than it had averaged in the years immediately following World War 2. The country’s business spent about 30billion dollars for new factories and machinery. National income available for spending was almost a third greater than it had been it had been in 1950. Consumers spent about 256 billion dollars; that is about 700 million dollars a day ,or about twenty-five million dollars every hour , all round the clock. Sixty-five million people held jobs and only a little more than
A. nearby explosion
B. thunderous noise
C. general public support
D. rapid economic growth

[单项选择]When the renewal verification is completed more than three months before the expiry date of the existing Document of Compliance or Safety Management Certificate, the new Document of Compliance or the new Safety Management Certificate should be valid from the date of （） for a period not exceeding five years.
A. beginningoftherenewalverification
B. completionoftherenewalverification
C. beginningofscheduleddrydocking
D. completionofscheduleddrydocking

[单项选择]

In approximating costs, the estimator considers the possible causes ofvariation of the cost estimates, including（）

A. budget
B. plan
C. risk
D. contract