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问题 单项选择题

最大允许误差为±2.0e、500＜检定分度数≤2000的衡器准确度等级为（）。

（A）特种准确度级

（B）高准确度级

（C）中准确度级

（D）普通准确度级

答案

参考答案：C

完形填空

Directions： Complete the passage below with the correct forms of the given words and phrases in the column (ONE is extra).

motivation       Positive        remain          accomplish         guarantee 

Appreciate       go after           however         Apart from         hardship    

When we talk about happiness， we’ll naturally relate it to 　1　 or pleasant emotions. Many people consider happiness to be their ultimate (最终的) goal in life that they will spend their whole lives 　2　. Then how can we achieve happiness？

One effective way is to try to 　3　 in good spirits anytime and anywhere. Contrary to the belief that happiness comes hand in hand with much wealth， money is never enough to 　4　 happiness. What we simply need to do is 　5　 the precious things we have in life， such as good health， family and friends. The secret to obtaining happiness is perfectly explained in the proverb “Happy is he who is content (知足的)” .

　6　 staying optimistic， one can also gain happiness by 　7　 something meaningful. For instance， doing charity work and volunteering to help those in need can give you a sense of happiness as you realize you are doing your part for a better world.

Never quit seeking after happiness because of the fear inside or the 　8　 outside. Everyone has the right to pursue happiness and will surely find it with enough courage and 　9　.
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选择题

“毛毛虫”与“蝴蝶”分别是昆虫发育的哪两个时期 （       ）

A．若虫、成虫    B．幼虫、成虫

C．卵、若虫     D．D、幼虫、卵
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