A、 Use a drill bit not less than 45 mm long.
B、 Use a drill bit that has a maximum length of 45 mm.
C、 The drill bit used is more than 45 mm.
答案：B
A、 Use a drill bit not less than 45 mm long.
B、 Use a drill bit that has a maximum length of 45 mm.
C、 The drill bit used is more than 45 mm.
答案：B
A. The function and operation of each unit in the system should be described. The location of the units shouldn’t be described.
B. The function, operation and location of each unit in the system should be deleted.
C. The function, operation and location of each unit in the system should be described.
A. The accuracy of the adjustment can vary.
B. The accuracy of the adjustment can be fixed.
C. The precision of the adjustment can be prevented .
A. With the aid of the component manufacturer, all components in this chapter can be overhauled in any workshops with different qualifications.
B. Without the data supplied by the component manufacturer, it is possible for the most qualified shop to overhaul any components included in this chapter.
C. You must overhaul any or all components in this chapter in an eligible shop on the basis of data provided by the component manufacturer.
A. Values in the limited range should not include parameters or variables not mentioned in the manual.
B. The specification of a given range of values in the manual excludes parameters and variables.
C. The range of values should not exceed the parameters or variables given in the manual.
A. When this material comes into contact with hot surfaces, it emits hazardous fumes.
B. Contact between hot surfaces and this material results in the release of harmful heat.
C. Dangerous fumes are consumed by this material upon contact with hot surfaces.
A. If the pump is not suitable to be used, replace it.
B. If the pump is outmoded, replace it.
C. If the pump malfunctions, change the location for it.
解析：这道题考察的是逻辑推理能力。句子的意思是如果水泵无法维修，就应该更换它。选项A符合题意，因为unsuitable意思是不适合使用，与unserviceable意思相近，所以是正确答案。
举个生动的例子来帮助理解：假设你的手机屏幕坏了，修理店告诉你无法维修，只能更换新的屏幕。这种情况下，你会选择更换新的屏幕，因为旧的屏幕已经无法继续使用了，就像题目中提到的水泵无法维修一样。所以正确的做法是选择更换新的屏幕，就像选择选项A中的意思一样。
A. The filter must be replaced before putting new oil in the system.
B. The replacement of the filter is optional before refueling the system.
C. The filter can not be replaced unless you put new oil in the system.
A. It is the responsibility of the operator to ensure that alternative tools or equipment can work well and are dangerous to the parts and personnel as the ones specified in the procedure if you use them.
B. If alternative tools or equipment are used, the operator must ensure that they can play the same role and are as safe as the tools or equipment specified in the procedure to the parts and personnel.
C. If the manufacturer can make sure that alternative tools or equipment can meet the requirement and are as safe to the parts and equipment as the ones specified in the procedure, you can use them.
A. If the lamp is too weak, charge the battery.
B. If the light is too strong, do a replacement of the battery.
C. If the light is not bright, the battery should be replaced.
A. Light surface blooming, which can occur on items in storage, is not detrimental to the component.
B. Surface blooming, often found on corroded items, has little adverse effect on the component when it is mild.
C. Items in storage tend to have surface blooming which is beneficial to the component.
