问题 选择题

下列对铁的性质的描述中,属于化学性质的是(  )

A.铁容易传热导电

B.纯铁是银白色的金属

C.铁在潮湿的空气中易生锈

D.铁有良好的延展性

答案

A、铁容易传热导电不需要发生化学变化就表现出来,是物理性质.

B、纯铁是银白色的金属用眼睛就能观察到,不需要发生化学变化就表现出来,是物理性质.

C、铁在潮湿的空气中易生锈需通过发生化学变化才能表现出来,是化学性质.

D、铁有良好的延展性不需要发生化学变化就表现出来,是物理性质.

故选C

阅读理解

阅读理解。

     Remembering your dreams will require some efforts on your part. But what your dreams can offer and

tell you about yourself will be well worth it. Here are some tips to help recall your dreams:

     1. Before going to bed, keep a clear mind. Tell yourself that "I will remember my dreams when I wake up".

This is actually a proven and effective way to recall your dreams.

     2. Have a regular bedtime and wake-up time. Make this your routine. Going to bed and waking up at a

regular time every day could aid in dream recollection.

     3. Avoid drinking and taking medicine before going to bed. These things may prevent you from

remembering your dreams.

     4. Keep a pencil and a notebook next to your bed so that they will be within reach as soon as you wake up.

Having a small lamp by your bedside is also a good idea, so you wake up in the middle of the night and can

record your dreams immediately.

    5. Do not get out of bed immediately. Upon waking from a dream, lie still in your bed, keeping your eyes

closed and moving as little as possible. Let your mind wander among the images of what you have just dreamed.

     6. Write down as many details in your dreams as you can, no matter how seemingly unimportant they may

be. Do not judge the content or worry if they make sense.

     7. Sometimes it may help to draw pictures. A picture is worth a thousand words, as the saying goes. Even

if you are not an artist, a simple drawing can help to recall details of your dreams.

1. This passage tells you ______

A. some useful tips to recall your dreams

B. the way to recall your dreams

C. the reason to remember dreams

D. many details in your dreams

2. Which of the following ways may NOT be useful for recalling dreams?

A. Avoiding taking alcohol (酒精)and medicine.

B. Not getting out of bed immediately.

C. Drinking a cup of hot milk.

D. Writing down as many details as possible.

3. What does the underlined "it" in the first paragraph mean?

A. Remembering your dreams.

B. Some tips to help recall your dreams.

C. Your making efforts to remember your dreams.

D. What your dreams can offer and tell you about yourself.

4. The author uses the saying "A picture is worth a thousand words" to_______.

A. show that a picture is better than words

B. say a picture is equal to thousands of words

C. prove that it's more important to draw pictures than to speak

D. indicate drawing pictures really helps to recall dreams

单项选择题