更多"It（）exactly thirty years since I gr"的相关试题:
[单项选择]It has been ten years since the Labour Party came into（）in that country.
A. control
B. force
C. power
D. charge
[单项选择]Expansion tank should be used to remove （） from cooling water.
A. scale
B. sludge
C. chemicals
D. air
[单项选择]Metal particles accumulated from the wearing of components in a diesel engine can result from lube oil that has been contaminated with（）.
A. abrasive particles
B. metallic oxides
C. corrosive acids
D. any or all of the above
[单项选择]Since heat will not flow freely from a body at a （） temperature to another at a （） temperature, it is necessary to expend mechanical work, heat, or electrical energy from an external source to achieve refrigeration.
A. lower；higher
B. shallower；deeper
C. larger；smaller
D. higher；lower
[单项选择]Coolant can be lost from a diesel engine jacket cooling waster system by leakage from（）
A. cylinder head cracks
B. piping joints
C. pump leaking
D. all of the above
[单项选择]When a vessel is swinging from side to side off course due to quartering seas，the vessel is （）.
A. broaching
B. pitchpoling
C. rolling
D. yawing
[单项选择]She was caught without a ticket and fined thirty dollars （）
A. at stake
B. on the spot
C. in nature
D. in reality
[单项选择]Thirty-five percent of the breaking strength of an anchor cable is generally accepted as the（）.
A. safe operating load
B. normal operating tension
C. emergency working load
D. allowable storm load
[简答题]Directions: For this part, you are allowed thirty minutes to write a letter. Suppose you are Zhang Ying. Write a letter to Xiao Wang, a schoolmate of yours who is going to visit you during the week-long holiday. You should write a t least 100 words according to the suggestions given below in Chinese.1.表示欢迎2.提出对度假安排的建议3.提醒应注意的事项
[填空题]网球英文记分方法love、（）、thirty、（）、game。
[填空题]CO2气体保护焊分为（）CO2气体保护焊和（）CO2气体保护焊两种。
[单项选择]甲烷化出口微量CO+CO2指标为（）
A. 10ppm
B. 20ppm
C. 5ppm
D. 25ppm
[单项选择]CO2甲烷化速度是CO的（）倍。
A. 1/4
B. 2
C. 1/2
D. 3
[单项选择]光合作用吸收CO2与呼吸及光呼吸作用释放的CO2达到动态平衡时，外界的CO2浓度称为（）。
A. CO2饱和点
B. O2饱和点
C. CO2补偿点
[单项选择]Since the burning or combustion takes place within the engine itself, the engine is known as （）.
A. a fire -tube boiler
B. an internal combustion engine
C. an external combustion engine
D. an internal combustion generator
[单项选择]海洋CO2储库比大气CO2储库（），海洋碳储库的各种微小变化可能对大气CO2产生（）的影响。
A. 小得多，很小
B. 小得多，很大
C. 大得多，很小
D. 大得多，很大
