Which of the following is NOT supposed to be done by self-motivated employees（）
A. Cultivating a hobby
B. Overworking at weekends
C. Looking for motivators
D. Renewing goals
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文章见教材第55页 UNIT3 Passage one1. What is the main purpose of the passage（）
A. To outline contrasting types of economic systems
B. To explain the science of economics
C. To argue for the superiority of one economic system
D. To compare barter and money-exchange system
The passage is mainly written to _____（）
A. talk about job choices
B. analyse a social phenomenon
C. encourage celebrity culture
D. introduce three famous people
According to the writer, lifetime learning can be exciting if _____（）
A. we are prepared for the changes
B. we know who President has on his support team
C. we read the publications of advanced institutions
D. we learn English or some other foreign languages
A plane figure moves in its plane. The velocity vectors of two different points on the plane figure are the same at a instant. Which statements are correct（）
All points in the plane figure have the same velocity at this instant
B. All points in the plane figure have the same acceleration at this instant
C. The angular acceleration of the plane figure must be zero, but the angular velocity may not be zero at this instant
D. The angular velocity of the plane figure must be zero, but the angular acceleration may not be zero at this instant
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