独立作用（independent effect）

Most people （）the view that children should be independent while some are opposed to it.

A:leave out B:let out C:feel like D:subscribe to

The independent report on government infrastructure contains （） reviews of the road and rail network.

A:prompt B:capable C:extensive D:spacious

Science is an enterprise concerned with gaining information about causality, or the relationship between cause and effect. A simple example of a cause is the movement of a paddle as it strikes a ping-pong ball; the effect is the movement of the ball through the air. In psychology and other sciences, the word "cause" is often replaced by the term "independent variable". This term implies that the experimenter is often "free" to vary the independent variable as he or she desires (for example, the experimenter can control the speed of the paddle as it strikes the ball). The term "dependent variable" replaces the word "effect", and this term is used because the effect depends on some characteristic of the independent variable (the flight of the ball depends on the speed of the paddle). The conventions of science demand that both the independent and dependent variables be observable events, as is the case in the ping-pong example. In the case of biorhythm theory, the independent variable is the number of days that have elapsed between a person’’s date of birth and some test day. The dependent variable is the person’’s level of performance on some specified task on the test day. Notice that although the experimenter is not free to choose a birthday for a given individual, persons with different dates of birth can be tested on the same day, or a single subject can be tested on several different days. 　　In order to predict the relationship between independent and dependent variables, many scientific theories make use of what are called intervening variables. Intervening variables are purely theoretical concepts that cannot be observed directly. To predict the flight of a ping-pong ball, Newtonian physics relies on a number of intervening variables, including force, mass, air resistance, and gravity. You can probably anticipate that the intervening variables of biorhythm theory are the three bodily cycles with their specified time periods. It should be emphasized that not all psychological theories include intervening variables, and some psychologists object to their use precisely because they are not directly observable. 　　The final major component of a scientific theory is its syntax, or the rules and definitions that state how the independent and dependent variables are to be measured, and that specify the relationships among independent variables, intervening variables, and dependent variables. It is the syntax of biorhythm theory that describes how to use a person’’s birthday to calculate the current status of the three cycles. The syntax also relates the cycles to the dependent variable, performance, by stating that positive cycles should cause high levels of performance whereas low or critical cycles should cause low performance levels. To summarize, the components of a scientific theory can be divided into four major categories: independent variables, dependent variables, intervening variables, and syntax. Many theories for predicting the relationship between cause and effect

A:testify their complete conformity with general scientific principles. B:justify the identity of dependent, independent, and intervening variables. C:specify the time periods of bodily cycles in terms of psychological tests. D:verify their prediction by variables inconsistent with conventions of science.

It’s been called the Gig Economy, Freelance Nation, the Rise of the Creative Class, and the e-economy, with the "e" standing for electronic, entrepreneurial. Everywhere we look, we can see the U.S. workforce undergoing a massive change. No longer do we work at the same company for 25 years, waiting for the gold watch, expecting the benefits and security that come with full-time employment. We’re no longer simply lawyers, or photographers, or writers. Instead, we’re part-time lawyers-cure-amateur’ photographers who write on the side.
Today, careers consist of piecing together various types of work, juggling multiple clients, learning to be marketing and accounting experts, and creating offices in bedrooms/coffee shops. Independent workers abound. We call them freelancers, contractors, sole proprietors, consultants, temps, and the self-employed.
This transition is nothing less than a revolution. We haven’t seen a shift in the workforce so significant in almost 100 years since we transitioned from an agricultural to an industrial economy. Now, employees are leaving the traditional workplace and opting to piece together a professional life on their own. As of 2005, one-third of our workforce participated in this "freelance economy". Statistics show that number has only increased over the past six years. While the economy has unwillingly pushed some people into independent work, many have chosen it because of greater flexibility that lets them skip the dreary office environment and focus on more personally fulfilling projects.
These trends will have an enormous impact on our economy and our society:
We don’t actually know the true composition of the new workforce. After 2005, the government stopped counting independent workers in a meaningful and accurate way. Studies have shown that the independent workforce has grown and changed significantly since then.
Jobs no longer provide the protections and security that workers used to expect. The basics such as health insurance, protection from unpaid wages, a retirement plan, and unemployment insurance are out of reach for one-third of working Americans. Independent workers are forced to seek them elsewhere, and if they can’t find or afford them, then they go without. Therefore, it’s time to build a new support system that allows for the flexible and mobile way that people are working.
This new, changing workforce needs to build economic security in profoundly new ways. For the new workforce, the New Deal is irrelevant. When it was passed in the 1930s, the New Deal provided workers with important protections and benefits but those securities were built for a traditional employer-employee relationship. The New Deal has not evolved to include independent workers. (424 words)
By saying "Independent workers abound" (Lines 2-3, Para. 2), the author probably means ______.

A:more and more independent workers are suffering B:the independent workers are bound to be minority C:the independent workers are around you D:there are large numbers of independent workers

It was in 1777 ______ Vermont, threatened with invasion, declared itself an independent commonwealth.

A:when B:that C:in which D:which

Most people （）the view that children should be independent while some are opposed to it.

A:leave out B:let out C:feel like D:subscribe to