题干

某实验小组在做“探究串联电路的电压规律”实验时,连好了如图所示的电路,闭合开关后发现L2正常发光,L1只能微弱发光。对这一现象产生的原因分析中,合理的是(      )

A:通过灯L1的电流较大

B:灯L1发生短路

C:由于灯L1的电阻较大,实际功率较小

D:由于灯L1的电阻较小,实际功率较小

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答案(点此获取答案解析)

D

同类题5

任务型阅读

    Reading is an interesting and useful thing. You can read a novel or a poem. But do you know how to read? Here's some advice for you.

    Define your purpose for reading. Before you start reading, ask yourself why are you reading this book.____Being specific and clear about your reading purpose not only helps you to eliminate books that you don't need to read. It also reminds you why reading the book is important to you as you are reading it.____

    ____ Whether you are reading fiction or nonfiction, it's important to enjoy what you read. Your friends may recommend books that they love, but those books might not necessarily be the ones you enjoy.

    Give up books that you don't enjoy. You may have selected books that are aligned with (与……一致) your purpose.____ But as you are reading them, there may still be some books that you won't enjoy reading. Whenever you realize that you aren't enjoying the book you are reading, give it up. Remember reading shouldn't be a chore (杂事).

    Give yourself a deadline to complete each book. Before you read each book, ask yourself when you need to complete this book. When you don't set a deadline to complete your book, there isn't a sense of urgency.____you tend to procrastinate (拖延).

A. When something is urgent

B. When something isn't urgent

C. Because reading is very important

D. Read only what you are attracted to

E. You may have selected books that you are attracted to

F. Most people read for two main reasons—pleasure or knowledge

G. This motivates you to keep reading and complete the book faster