[单项选择]They built strong Walls round the town as a （　） against the enemy.
A. defense
B. defend
C. defeat
D. depend

[简答题]round trip

[填空题]What color are the walls
The walls are ______.

[简答题]GU-AG规则(GU-AG rule)

[单项选择]These walls （） stone.
A. are made of
B. made of
C. are made into

[填空题]The last round -- the 1986-1994 Uruguary Round led to ______.

[单项选择]Ag-DDC法
A. 氯化物
B. 砷盐
C. 铁盐
D. 硫酸盐
E. 重金属

[填空题]
Write: W for walls
D for doors
C for ceilings

36	double thickness plaster board
37	mechanical ventilation
38	air conditioning

......

[简答题]The consolidation of the crumbling walls and towers has been carried out in accordance with a program agreed with the Department of the Environment. 2．A doctor’s obligation when he can no longer hold back the approach of death is to make the patient comfortable, including easing his pain. 3．I cannot honestly see that a system which would require US to compromise the morning after the election is really SO morally inferior to a system which has already obliged US to compromise our policies two years before polling day. 4．That country will continue to make new nerve gas weapons after the conclusion of a global treaty banning them takes effect, according to a secret administration policy review. 5．One lesson he learned was that the key to survival in emergency was making the best use of whatever you have at hand.

[单项选择]低剂量TD-Ag
A. 引起T细胞免疫耐受
B. 引起B细胞免疫耐受
C. 引起T、B细胞免疫耐受
D. 不引起免疫耐受
E. 引起免疫抑制

[单项选择]低剂量TI-Ag
A. 引起T细胞免疫耐受
B. 引起B细胞免疫耐受
C. 引起T、B细胞免疫耐受
D. 不引起免疫耐受
E. 引起免疫抑制

[单项选择]高剂量TI-Ag
A. 引起T细胞免疫耐受
B. 引起B细胞免疫耐受
C. 引起T、B细胞免疫耐受
D. 不引起免疫耐受
E. 引起免疫抑制

[单项选择]AG的计算公式为
A. AG=(Na⁺+Mg²⁺)-(Cl^-+HCO₃^-)
B. AG=(Na⁺+K⁺)-(Cl^-+HCO₃^-)
C. AG=(Na⁺+Ca²⁺)-(Cl^-+HCO₃^-)
D. AG=(Ca²⁺+K⁺)-(Cl^-+HCO₃^-)
E. AG=(Mg²⁺+K⁺)-(Cl^-+HCO₃^-)

[单项选择]

The Great Wall of China
Walls and wall building have played a very important role in Chinese culture. These people, from the dim mists of prehistory have been wail-conscious; from the Neolithic period when ramparts of pounded earth were used to the Communist Revolution, walls were an essential part of any village. Not only towns and villages; the houses and the temples within them were somehow walled, and the houses also had no windows overlooking the street, thus giving the feeling of wandering around a huge maze. The name for "city" in Chinese (cheng) means wall, and over these walled cities, villages, houses and temples presides the god of walls and mounts, whose duties were, and still are, to protect and be responsible for the welfare of the inhabitants. Thus a great and extremely laborious task such as constructing a wall, which was supposed to-run throughout the country, must not have seemed such an absurdity.
However, it is indeed a common
A. was built in a single dynasty
B. was refurbished in the fourth and third centuries BC
C. used existing foundations
D. was built by the Chin, the Chao and the Yen